syntax to highlight plan ref tags

git-svn-id: http://svn.textmate.org/trunk/Bundles/Mediawiki.tmbundle@12057 dfb7d73b-c2ec-0310-8fea-fb051d288c6d
plist changes

git-svn-id: http://svn.textmate.org/trunk/Bundles/Mediawiki.tmbundle@12064 dfb7d73b-c2ec-0310-8fea-fb051d288c6d
added snippets for PMID and DOI type references

git-svn-id: http://svn.textmate.org/trunk/Bundles/Mediawiki.tmbundle@12065 dfb7d73b-c2ec-0310-8fea-fb051d288c6d
Add readme.
Move folding settings.
Use drop down for Citation Needed snippet, remove duplicate.
Combine 3 reference snippets into a 1 with optional sections.
Improve rendering of symbol list and correct comments.
Allow folding from one heading to the next one.
Support heading styles by expanding scope.
Fix header commands to create the correct levels.
Organize bundle menu and improve bundle description.
Snippet for syntaxhighlight blocks on Wikipedia. (code→)
Scope the name value for named references better.

string.quoted → string.quoted.ref.name
entity.name.tag.key → entity.name.tag.name
Prevent self-closing `ref` tags from breaking highlighting.

When using a self-closing "ref" tag like `<ref name="foo"/>`, the syntax coloring would stop for the subsequent text.
Merge heading matches into a single rule.

By using captures we can simplify the rule by using the captured number of `=` to give us the correct scope.
Add initial semantic classes.
Remove paired `=…=` header snippet in favor of smartTypingPairs.
Add citation command, presents a list of available citations.

Tab trigger: cite⇥
Cleanup the grammar todo list.