Remove PyQt refs, rework signals

Based on Charles's feedback, cannot have PyQt imports here. Note that
there is a corresponding branch in the vistrails repo that also needs
to be merged!
Merge branch 'bugfix-579-fix-animate-signals'
trying to recast b4 failing
fix #586
added test case
added test to CMakeLists.txt
removed comment that I had set for me, not needed anymore
fix #598
fix 596 adds show function
Merge remote-tracking branch 'devel/issue_598_setcolormap_warning'
Merge remote-tracking branch 'devel/issue_596_show_func_missing'
Merge remote-tracking branch 'devel/issue_586_polar_proj_broken_bad_param_setting'
Merge remote-tracking branch 'devel/issue_441_gsRegrid_try_recast_b4_error'
Add Test Manager
Patch rebase discrepanies
Update testing
Add CMakeLists
Remove unused diagnostics
Add BaseMap Opacity button
Add dv3d to CMake