Merge pull request #4 from creiht/master

Forgot to remove a print statement
fixed content-type handing
Merge branch 'master' of github.com:zerovm/zerocloud
added CORS support, hopefully
CORS handling is optional now, "zerovm_use_cors = true" should be added to config file
Added more timings to the cdr line
nvram support, some new tests
added sysimage support, small refactoring, preparations for GET