Fix elided text issues in the dock title bar label.
Provide a workaround for issue #37

This works around a segfault in Qt with widget graphics effects.
https://bugreports.qt-project.org/browse/QTBUG-24792
Fix issue #40

This fixes the issue where two close buttons are shown on the dock tabs
on OSX.
Merge branch 'master' of github.com:nucleic/enaml into ui-builder
add a Frame widget type
base Container on Frame
base ScrollArea on Frame
WIP commit to fix the background color issues in a scroll area when using stylesheets.
add testing script
fixup background color handling
base the FlowArea on Frame
Merge branch 'master' of github.com:nucleic/enaml into ui-builder
update the dock area tool bars

This updates the dock tool bar items to be resizable and use stylesheet
for the drop shadow instead of a graphics effect. The graphics effects
are more expensive and segfault on OSX.
Merge branch 'master' of github.com:nucleic/enaml into ui-builder