Room and Message tabs: focus input line when convenient; Fix #180

As suggest by Daenyth in #185
Merge remote-tracking branch 'upstream/master' into master_regression_180_tab
Fix: ensure git is always run from the project directory

When trying to obtain the version hash
Windows + CPack: fix packaging

Package the correct cpack’s temporary directory
Merge pull request #209 from ctrlaltca/cpack_win_fixes

Cpack fixes for windows (fixes #207)
Add WITH_QT4 note to README
Merge pull request #194 from ctrlaltca/master_regression_180_tab

Room and Message tabs: focus input line when convenient; Fix #180