Remove empty title="" attributes

These were needed by Anolis, but have no effect for ReSpec.

To make the diff readable, no effort was made to re-balance the lines,
which makes it look a litte silly in places.
Remove some stray whitespaces, e.g. in "regionAnchor X"
Merge pull request #70 from foolip/rm-empty-title-attr

Remove empty title="" attributes
Merge pull request #72 from foolip/rm-stray-whitespace

Remove some stray whitespaces, e.g. in "regionAnchor X"
Fix the description of automatic line position

The algorithm that follows uses showing tracks, not active cues.
Merge pull request #74 from foolip/auto-line-position

Fix the description of automatic line position
Fix typo "where" -> "were"