PyMemberInfo is generic now
MembersManagers now accepts PyMemberInfo (needed to get abstract and other info) (todo: doc)
Merge remote-tracking branch 'origin/master'

Conflicts:
	python/src/com/jetbrains/python/psi/PyUtil.java
PyArgumentList#addArgument fixed and test added
method to detect that file type was detected from content
treat files with plain text file type that was detected from content as files with unknown file type
PY-2858 Pull Up Abstract Method (finally!)
Merge remote-tracking branch 'origin/master'
Platform tests: do not change detected platform with initPlatformPrefix
EA-53558 - CCE: DatabaseVirtualFileSystem.dataSourceUpdated
IDEA-100755 Language injection: properties: prefix causes ISE at PropertyImplEscaper.decode()
IDEA-117734 Clipboard history no longer works by num hotkeys
IDEA-80056 Column selection mode improvement

fix TextStart/EndWithSelection, add more action tests
make EnumeratorStringDescriptor thread-safe
unnecessary methods from HgVersion deleted; HgVcs used instead of project;  IllegalArgumentException thrown instead if assertion