Fix grammar, punctuation, spelling, trailing whitepaces and newlines; Fix typo in css
Based on respencer's work at https://github.com/respencer/Shaarli/
Closes https://github.com/sebsauvage/Shaarli/pull/103
Merge pull request #20 from nodiscc/fix-typos

Fix grammar, punctuation, spelling, trailing whitepaces and newlines; Fix typo in css