Reworked "Parent Selectors" section.
Merge pull request #131 from seven-phases-max/master

Reworked "Parent Selectors" section.
Corrected a mistake

The variable @width was declared, but not actually used, which didn't make a lot of sense.
Merge pull request #132 from tobua/patch-1

Corrected a mistake
parent-selectors.md: fixed incorrect sentence.
Update using-less-in-the-browser.md

globalVars is a useful feature, but not documented yet

I tried to fill this gap, perhaps not in the best way possible.
Merge pull request #134 from scriptguru/patch-1

Update using-less-in-the-browser.md