fix typo in 'togglekeys-enable' gsettings value
Add support for metacity-theme-2.xml

Closes https://github.com/mate-desktop/mate-control-center/issues/92
Add keywords to dot desktop files, close #102.

Patch by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Add main category to mate-theme-installer.desktop, fixes #103

Patch by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Several man pages have grammar errors, fixes #101

Patch by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Update news for 1.8.2
Bump version to 1.8.2