Merge pull request #27 from varya/features/faq__modifier-naming

[FAQ] Why the modifier CSS classes are prefixed with their parent block ...
fix(faq): clean up question markup
docs(readme): remove appveyor
fix(faq): add html language to code sections
fix(header): add fixed height to image

Fixes display on android browser
More arguments to .block_mod notation
[FAQ] About global modifiers