Fixed location of config file on Mac (and probably Windows).
Enable C++11 by default.
Do some basic self-checks when initializing the crypto backend.
Merge branch 'movestill-fixConfigPath'

https://github.com/keepassx/keepassx/pull/49
Fixed typo in INSTALL
! binds stronger than ==

This should just avoid useless copying if more than 1 attribute is
selected (and the option to copy attributes is unavailable).

This also fixes a clang warning.
Merge branch 'yayachiken-yayachiken-dev'

https://github.com/keepassx/keepassx/pull/58