Fix some formatting and grammar errors.
Merge pull request #7 from markstory/controller-fixes

Fix some formatting and grammar errors.
Fix grammar and formatting on the routing docs.
Fix grammar and typos in controller parameter docs.
Update filter and validation docs.
Updates to the Controller/Session docs.
Update grammar and formatting on cache + csrf sections.
Merge pull request #8 from markstory/doc-fixes

Update grammar and formatting for controller docs
add third repo
update xsrf docs
Update
Merge branch 'master' of github.com:beego/beedoc
Update why
update donate list