New Functionality
1. Excitation editor enhancements to show file name in title-bar and
to limit control point movement to valid range. 

Bug Fixes
1. Models with coordinate-coupler constraints work in various tools in
the GUI. (bug 736)
2. Fix Exception when animating motion produced by Forward Tool. (bug 715)
3. Coordinate motion type (rotational, translational) is sometimes
incorrect(bug 721)