Remove hidden comments for cue and region settings

These aren't particularly illuminating, and the indentation would get
mangled by format.py. Fixing format.py does not seem worthwhile.
Merge pull request #83 from foolip/rm-setting-comments

Remove hidden comments for cue and region settings
Add missing space in 'to height'
Separate the steps for cue and region lists in rendering

This was split in a slightly odd way before...
Merge pull request #89 from foolip/to-height

Add missing space in 'to height'
Merge pull request #90 from foolip/let-regions

Separate the steps for cue and region lists in rendering
Drop 'cue' from 'A cue line position/alignment'

No other terms in this section except 'A cue box' include 'cue'.
Quote strings in the syntax section for consistency

Compare with e.g. the "align" setting.
Merge pull request #93 from foolip/quote-strings

Quote strings in the syntax section for consistency
Merge pull request #91 from foolip/a-cue-line

Drop 'cue' from 'A cue line position/alignment'
Merge commit '174d9919bafc482d15b22c224c9d82dc8eb631d0' into revert-position-size-align
Merge commit 'caa71756bec73aabcef2177c3ea622dd68c07f5d' into revert-position-size-align

Conflicts:
	webvtt.html
Merge commit 'b81d77f76fe77313f3147706fcfb88b4744b3e7c' into revert-position-size-align

Conflicts:
	webvtt.html