HashList.pop
AsyncHttpServer.send(String) Do not overwrite content type if already specified.
Fixes Ion Issue 169 (https://github.com/koush/ion/issues/169)
Removed extra CRLF

Removed extra CRLF being sent after boundary end
Merge pull request #114 from GeropaPidurulein/master

Fixes Ion Issue 169 (https://github.com/koush/ion/issues/169)
indent