Merge pull request #740 from Wylkon/reboot

Documentation improvements :)
insert style ls-background in helper classes and removing in base
standardizing alerts and background with variables
applying ls-background-primary in color-theme
update documentation to ls-background
Commenting code of progress bar because some feature was not working.

We need to investigate this issue, but this is not a blocker to launch
the framework
Fixing color of danger button.
Fixing bug of background-color in buttons that not a link.
Changing the classes that make the dashboard box

The class .ls-board-box that mount the box of dashboards was very
similar that ls-box. I change the name of ls-board-box to ls-box and I
put the class ls-board-box on parent. Any doubts see the documentation
for more examples.
Changing some text and examples on box documentation
deleting unused custom fields.
cleaning the code of custom select example
Commenting the code that make the hover style of links in documentation.

That was causing a bug on links of locastyle.
Fixing bug of color hover in dropdown arrow of btn-danger.
Moving the Chrome extension to Introduction page.
Upgrading the code of example

I upgrading the example to new code of ls-board-box / ls-box
Merge pull request #742 from diegoeis/reboot

Modyfing many little things on doc.
Merge pull request #741 from deividmarques/reboot

standardizing alerts and background with variables
Added semicolon in js.
Added textarea classes