we now draw it with alpha, so block highlighting and find scope
paintings shine through

Reviewed-by: ck

Remove harmful over optimization (made it impossible to restore
nested folding states)

Merge managesDirectory() and findTopLevelForDirectory()
into one giving managesDirectory() an optional topLevel
parameter. This removes the need to go up the directory
hierarchy twice when checking for Merurial or git and also
saves some checks for CVS/Subversion.
VCSManager: Check cache in reverse order starting out with
the full path first to improve handling of nested repositories.
Rubber-stamped-by: con
Acked-by: dt

Task-Nr: QTCREATORBUG-1443

Fixes: - react on build/ run configuration changes
       - now notices environment changes, like switching Qt versions
       - start button is now only shown if we have a valid qemu runtime
       - enabled/ disabled state works properly when loading a project

Task-number: QTCREATOR-210, QTCREATORBUG-1252, QTCREATORBUG-1082
Reviewed-by: ck

The new and cleaner foldingIndent in the block user data will
make it easier to support other kinds of indentation for various
other programming languages (like Python).

Ensure clean paths are returned by
IVersionControl::findTopLevelForDirectory() as otherwise caching
of VCSManager breaks (Windows) and commands are executed all over
again. Fix display in SVN/CVS.

Acked-by: con

If a document wasn't parsed correctly the binder won't be run - and
rootObjectValue will be null.

Task-number: QTCREATORBUG-1449

Doh!

Also fixed the tests for it.

Latest qt renamed qml executable back to qmlviewer, and also named
the executable again QML Viewer instead of Runtime/Launcher.

the method name got changed in 5732a440.