Merge topic 'time_inspector'

7c8dac68 Added test for pqTimeInspectorWidget (TimeInspector).
56db427b Fixed warnings
e351cde7 Fixed warnings.
7f1a8d09 Update tests after pqCurrentTimeToolbar was replaced.
26fd9118 Remove deprecated pqCurrentTimeToolbar.
ac872a8e Fix pqTimeInspectorWidget size.
bfd71d1c Update pqTimeInspectorWidget to support vcr/current time widgets.
e41a5dc9 Added new pqAnimationTimeWidget.
c5a7e65c Add better tooltip for enable/disable checkbox in TimeInspector.
28bd29f7 ENH: Added support for a new "Time Inspector" panel.
8d7ee872 BUG: fix animation on delete.
Updating doxygen documentation.

Added mechanism to document API changes in the generated doxygen
documentation. Developers are now expected to keep MajorAPIChanges.md
file updated as they change APIs or major design features.

This change now requires doxygen 1.8 or greater since we now rely on
markdown support in doxygen.

Change-Id: I55b340625cbd21cff7913d1607062c0cb4d72465
Merge topic 'cleanup_doxygen'

404d9b79 Updating doxygen documentation.
Merge master into next

* commit 'aa525d5d662ea6c7036e47a07e4c8a146a773e5f':

Change-Id: I8612e7344d082c89308939f30e71581e88b1aa76