refactoring navbar
fix typo
some navbar refactoring
update style for buttons & remove css from them file
reorder buttons.scss include order
Merge remote-tracking branch 'origin/master' into core-alex
upate workbench navbar icon position
some progress on buttons hover state, need refactoring later...
Merge pull request #3 from gengo/core-alex

Buttons & some refactoring
Added a function to change color of base
Merge remote-tracking branch 'origin/master' into gh-pages
merged css file
Added change base color function into example pages