refine usemin
add support for JS
imgs in subfolder of app/image/ now will not be processed by filerev, this is for some cases that you need to concat image url, whick will not be replaced correctly
adjust gruntfile
refine code
refine code
stop when error
add inspector-gadget
add swd.inspector-gadget
remove inspector-gadget
add remove html function
refine code
Merge branch 'master' of https://github.com/martin-liu/m-angular-boilerplate into staging

Conflicts:
	app/index.html
adjust style