iTALC - OpenSource classroom management

To correct way to set italc in the Exec (file ima/data/italc.desktop.in), propose to replace the @prefix@ to @CMAKE_INSTALL_PREFIX@.

This patch can be taken in my git
(git://git.altlinux.org/people/solo/packages/italc.git) in the form of
branches:

1. ALT/italc2/patch/italc.desktop-exec (see
http://git.altlinux.org/people/solo/packages/italc.git?p=italc.git;a=shortlog;h=refs/heads/ALT/italc2/patch/italc.desktop-exec)
for italc 2.0.1. Package italc2-2.0.1-alt5 (see
http://git.altlinux.org/people/solo/packages/italc.git?p=italc.git;a=commit;h=0340c575b298cdce90fc27310104eedbce6752c2)
compiled with the patch.

2. italc2/patch/italc.desktop-exec (see
http://git.altlinux.org/people/solo/packages/italc.git?p=italc.git;a=shortlog;h=refs/heads/italc2/patch/italc.desktop-exec)
- For branch italc2 (git://italc.git.sourceforge.net/gitroot/italc/italc).