(Redmine issue: #7041)

(Redmine issue: #7544)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

(Redmine issue: #7041)

Original idea wa to use Docker for this purpose, but it turned out full
featured virtual server will be much better suited for this task due to
the comlexity of the whole environment.

(Redmine issue: #7041)

By this move we attempt to speed up the searching process and lower the usage of system resources, because the amount of data the database engine needs to load and process will be significantly smaller. (Redmine issue: #4274,#4275)

Each group has an attribute indicating self-management. When enabled, notice about group membership requests is sent to all group managers. (Redmine issue: #5832)

(Redmine issue: #3387)

Removed unnecessary duplicit section about installation. (Redmine issue: #3361)

The installation manual was enhanced with the option of installing the project directly from Git repository. This option overlaps with the installation process for local development, so the development documentation page was also updated accordingly. (Redmine issue: #4216)

* The creation of Python virtual environment is now a separate makefile target.
* The 'develop' target now reuses already defined targets.
* Using python-dotenv to local configuration customizations.

(Redmine issue: #3387,#4216)

Previous approach, while better in some aspects caused troubles on our automated build system, because it required for the Mentat to be correctly installed for hawat-cli to be available. (Redmine issue: #3387,#4216)

(Redmine issue: #4789,#4216)

This commit brings in considerable amount of work. When working on this issue everything was so tied together, that I have abandoned all attempts to split it into multiple commits. There are following changes and more:

* Implementation of lightweight chroot for containing the application in single directory tree.
* Design changes in scripts and daemons to implement the lightweight chroot.
* Many configuration file changes to make everything work properly.
* Makefile additions, new targets related to running
* Updated development documentation page.

(Redmine issue: #4216)

Currently only built-in Flask commands run, shell, etc. are available. It can be used to launch development web server, which is now documented in development documentation page. (Redmine issue: #4216)

Documentation, build procedures...almost everything was revised and rethought.  (Redmine issue: #4216,#3387,#3361)

* Merged pylint and pyflakes tasks for simplicity,
* Fixed broken clean task.
* Updated development documentation to include Grunt as prerequisite.
* Few additional minor tweaks.

(Redmine issue: #4216,#3387,#3361)

Following big improvements were made to make the development more easier:

* Created the 'setup.py' script to support native Python packaging with setuptools and pip.
* There is a new target 'make develop', that will bootstrap the Python virtual environment, install all production and development requirements and install the whole project in editable mode.
* Revised the dependency installation targets.
* Big facelift of makefile help target.
* Added target for build environment cleanup.
* Added target for initialization of new translations of Mentat and Hawat.
* Added target for building locally Python packages.
* Added target for building locally Debian packages.
* Updated documentation page for developers.

(Redmine issue: #4216,#3387,#3361)

The database migrations for IDEA event database *mentat_events* are now implemented. I have moved this issue to the next release, because there is code already merged in the current development branch that depended performing the migrations on target system. It was a choice of either removing that commit, or going forward with implementation. I have decided to implement it immediately, because this issue is blocking many more features.

The implementation is again based on Alembic tool, which is already being used for migrations on mentat_main metadata database. It is however separatelly configured instance, merging both instances into single one would require considerably more amount of research and work.

I have also updated accordingly manual pages regarding installation and upgrading. Very important bit of information was stamping the database with latest migration revision after clean installation.

(Redmine issue: #4230)

Moved some content from website to autogenerated documentation to prevent from repeating the same content on multiple places. Added information about versioning and tagging. (Redmine issue: #3361)

Improved documentation with focus on possible developers, so the Overview and Development section were greatly improved. (Redmine issue: #3361)