Should have been done earlier. 2.1.80 was burned in the pre-2.1.0->2.0.1
days, and we'd like to have odd subminor for 'working' and even subminor
numbers for pure cherry-picking release branches anyway.

Task-number: QTCREATORBUG-2326

Task-number: QTCREATORBUG-2335

Fix README, some spelling errors, remove contractions,
exclamation marks, correct some plural forms, join split messages.
Add QCoreApplication::translate to non-Q_OBJECT-classes.
Fix some lupdate warnings about discarding meta-data (//:).

Merge-request: 172
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

 * Fix all warnings about non-explicit constructors except for those
   in 3rdparty code.

Task-number: QTCREATORBUG-2074

Task-number: QTCREATORBUG-347
Reviewed-by: ck

Task-number: QTCREATORBUG-2130

Reviewed-by: ck

in qglobal.h, we make Q_UNUSED call a template function that takes T&
as a parameter. So we can't pass an rvalue (the result of the &&
operator).

Reviewed-By: Trust Me

Reviewed-by: ck

Reviewed-by: ck

One shall check the event is a QKeyEvent before static_cast