add release notes for 0.7.3
moved long release notes to a new file.
just the latest notes are in the README.md now.
minor test file fixes
added dist versions
removed outdated comment about i18n plugin
incorporate regex improvements from @bryanforbes. thx Bryan!
Merge branch 'dev' into cram

Conflicts:
	dist/curl-for-dojo1.6/curl.js
	dist/curl-for-jQuery/curl.js
	dist/curl-for-ssjs/curl.js
	dist/curl-kitchen-sink/curl.js
	dist/curl-with-js-and-domReady/curl.js
	dist/curl/curl.js
recompile dist versions