Handle RTL sentences on "Not found" page
A little refactor of find of language writing direction
Fixed #370: Build error when DISABLE_INTERNAL_PLAYER=1
Fix compilation with Qt 4.7 (issue #371)
Fixed a build failure with Qt 4.6 and older
Another Qt 4.6 build fix
Fix compilation errors on Qt 4.5
State the minimal required Qt version: 4.5
Remove 'Applications' category from desktop file (patch by Dmitry E. Oboukhov)
Do not install anything in $PREFIX/share/app-install (patch by Dmitry E. Oboukhov)

This is a private area of app-install application (Software Center),
and it is impolite to install files into places we don't own.

Not to mention it causes installation conflicts in Debian/Ubuntu.

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689205
Preconfigure goldendict-wordnet path (patch by Dmitry E. Oboukhov)
Automatically add installed opendict dictionaries (/usr/share/opendict)
Fixed #359: Crash on Xubuntu 13.04 x64 due to XGrabKey
Fixed #183: Provide a higher resolution main GoldenDict icon

Finally! :)
Fix compilation under MacOS
Fix localization files' installation on Linux/MacOS
Use $PREFIX/share/goldendict for locale files per Linux conventions

There is no need to use $PREFIX/share/*apps*/goldendict.
Linux: Better detection of installation prefix

1. qmake PREFIX=/usr

or

2. PREFIX=/usr qmake

or

3. export PREFIX=/usr; qmake

All should work.

Previously, the most typical #1 was not working.
Updated French translation - fixed typos
Merge pull request #373 from virtualtam/master

Updated French translation - fixed typos