adding page of css perf
Merge pull request #1150 from deividmarques/3.4.0

adding page of css perf
[perf-css] deleting unused CSS file.
[perf-css] decreasing selectors of collapse module.
[perf-css] Decreasing the float number in framework. From 25 to 14 floats declarations.

I just @extend the existing class .ls-float-left when needed.
Removed barbecue cheet. :(
[perf-css] removing -o- prefix...
[perf-css] trying to improve selectors of ls-topbar in pre-panel
[perf-css] Removing nesting selectors of ls-table component.
Merge pull request #1151 from Wylkon/3.4.0

Removed barbecue cheet. :(
removing old images in the footer
adding sprites footer
improvementing sass and html to footer
[perf-css] removing nesting selector of ls-area-account in ls-sidebar
Just changing the comments line markup to be more legible.
[perf-css] decreasing specificity css selector in ls-submenu
Merge pull request #1153 from deividmarques/3.4.0

improvementing footer
Merge pull request #1154 from diegoeis/3.4.0

Little issues to improve CSS performance and cascading
[perf-css] - removing nesting selector of ls-menu and ls-submenu
Merge pull request #1155 from deividmarques/3.4.0

[perf-css] - removing nesting selector of ls-menu and ls-submenu