Technical corrections in http.html
- §2.1.0.13 Fixed example syntax of POST _search to say "POST" instead of "GET"
- §2.1.0.22 Added POST _search to the Summary section
- §2.1.0.17 Fixed HTTP Command 
   "POST [base]/[type]/[id]/_history/[vid]/meta" to say 
   "POST [base]/[type]/[id]/_history/[vid]/_meta" (note the underscore)

git-svn-id: http://gforge.hl7.org/svn/fhir/trunk/build@3695 2f0db536-2c49-4257-a3fa-e771ed206c19