Setup tags as highlight pairs

This allows moving between tags with ⌃↓/⌃↑ and selecting an open/close pair with ⇧⌘B.
If user cancels Insert Entity… we silently close window

Previously we would abort, which makes TextMate show an error sheet.

Closes #26.
Let Insert Entity… show entities sorted

This improves type-to-select slightly.
Avoid (some) exceptions when inserting swf files via drag’n’drop

Fixes #1.
Use version 1.8 of ruby for bundle items

10.7 and 10.8 only include ruby 1.8, so all bundle items have been written to work with that. Optionally supporting ruby 1.9 and 2.0 is problematic as these versions are not fully backwards compatible.

#ignore
Add word boundary assertion for tag name used in indent rule

Without this, ‘col’ would match ‘colgroup’ causing wrong indent for the latter.
Allow invalid `<` match to work in all HTML based grammars

Using R: in front of the scope ensures that it loads after any other injected rules to prevent conflicts.
Revert ruby 1.8