Version & date bump for ChangeLog and manual page

ChangeLog

-git - ?
+1.5 - 2009-05-02
 	- Fixed incorrect apparent size on directory refresh
 	- Browsing keys now work while file info window is displayed
 	- Current directory is assumed when no directory is specified

doc/ncdu.1

-.TH NCDU 1 "September 10, 2008" "ncdu-git" "ncdu manual"
+.TH NCDU 1 "May 2, 2009" "ncdu-git" "ncdu manual"
 
 .SH NAME
 \fBncdu \fP- NCurses Disk Usage