Add Qt5 support.
Add Qt5 support.
Fix PyQt4&5 support.
Update installation.rst

libtiff4-dev is obsolete
add ico save support
add tests and docs
Update CHANGES.rst [ci skip]
Added ref to getpalette
Merge pull request #1000 from wiredfool/image-doc

Added ref to getpalette
Merge remote-tracking branch 'upstream/master'

Conflicts:
	PIL/ImageQt.py
Fix bad importÃ
Merge pull request #1003 from AurelienBallier/master

Use PyQt4 if already imported
Update CHANGES.rst [ci skip]
Merge pull request #989 from thegeorgeous/patch-1

Update installation.rst [ci skip]
More tests for ico save
Merge pull request #1007 from wiredfool/ico_save

Ico save, additional tests
Update CHANGES.rst [CI skip]
Test for issue #1008
Fix #1008, Correct argument to PySequence_Fast_GET_ITEM
Fix compilation on debug versions of python