Update license headers and add new licenses

- Added LICENSE.LGPL21, LICENSE.LGPLv3 & LICENSE.GPLv2

Change-Id: If7c5fa43341211def780bcb77f922b54ddfafb45
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Doc: List more file types as example files

Include some additional (text-format) file types to list as part
of the examples.

Task-number: QTBUG-40831
Change-Id: Ieca52310b1d847bf6c7a2fc4aacb1e4b9f603767
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Bump version

Change-Id: I255ebe9805cb02abaa6f04af816fc5843f3a96c3
Fix build of browser example with QT_NO_CLIPBOARD

Change-Id: I408581c6fa655accc22830ed4fb2897a7651dba4
Reviewed-by: Michael Bruning <michael.bruning@digia.com>
Merge remote-tracking branch 'origin/5.3' into 5.4

Conflicts:
	.qmake.conf

Change-Id: Iefeecd286820593600dbd4bee5040977d42bdfc3
Merge remote-tracking branch 'origin/5.4' into dev

Change-Id: Icc80bf1b3584ea34a073c417ba7c54dfc6f4d106