Fix GTK2 compatibility

Fix two GTK2 version issues: VNC segfaults and RDP plugin memory leak.
Merge pull request #293 from amon-sha/fix_gtk2_compatibility

Fix GTK2 compatibility
Redirect users to the wiki and the ML
Merge pull request #326 from giox069/gtk3

Fix compilation problems with latest version of FreeRDP/FreeRDP master
Merge branch 'FreeRDP-gtk3'
GTK3 migration - remmina_chain_button to grid layout
Update README
Update README
Merge pull request #328 from giox069/gtk3

Fix missing extended keycode and 'up' action when releasing all keys
Merge branch 'gtk3' of https://github.com/FreeRDP/Remmina into gtk3
Merge branch 'gtk3' of github.com:FreeRDP/Remmina
Update to FreeRDP changes (removed CLRBUF_24BPP)
Merge pull request #333 from giox069/gtk3

Fix compilation issues with latest FreeRDP
Make 8bpp and 32bpp works. Fixes #329

Ignore alpha channel coming from FreeRDP when updating screen area,
restored also previously removed OrderSupport flags
Merge pull request #334 from giox069/gtk3

Make 8bpp and 32bpp working again. Fixes #329
Added more translations from launchpad, fixes #216

Added the following languages to Remmina:
Arabic, Asturian, Bengali, Bosnian, Catalan of Valencia, English (Australia),
English (UK), Estonian, Finnish, Galician, Hebrew, Croatian, Japanese,
Khmer, Kannada, Korean, Latvian, Malay, Burmese, Norwegian Bokmal,
Occitan (post 1500), Portuguese, Romanian, Shan, Sinhalese, Slovenian,
Albanian, Serbian, Teleugu, Uyghur, Chinese
Merge pull request #336 from giox069/gtk3

Added more translations from launchpad, fixes #216
Merge branch 'gtk3' of github.com:giox069/Remmina
GTK3 migration - @giox069/Remmina.git integration + ccount fix (giox069)
Merge branch 'master' of github.com:antenore/Remmina into gtk3