fix out of source build

Merge

Centered desc label. (Fixes issue #461)

Fixes password not actually saving when "save password" is checked in the HWPasswordDialog called by HWForm. Added padding to QDialogButtonBox buttons. Fixed code indentation starting on hwform.cpp:1343.

Accidentally left atexit() inside a mac-only section in last revision (rbecac012d502)

Moved FileEngineHandler instance in main() to be a pointer released "atexit". (Fixes issue #509)

Moved library version info out of about.html and into a QLabel beneath Hedgehog.png on about page.

- Allow server admins to use DELEGATE even when not room owner - Show number of clients per version table on /stats command

Some ignoring

Server messages localization using Qt's l10n subsystem: - Strings to localize are marked with loc function in server sources - CMake finds loc calls and generates C++ header containing array of strings marked - lupdate - ... - PROFIT!