Tested on Windows 7.

Author: Andrew Or <andrewor14@gmail.com>

Closes #745 from andrewor14/windows-submit and squashes the following commits:

c0b58fb [Andrew Or] Allow spaces in parameters
162e54d [Andrew Or] Merge branch 'master' of github.com:apache/spark into windows-submit
91597ce [Andrew Or] Make spark-shell.cmd use spark-submit.cmd
af6fd29 [Andrew Or] Add spark submit for Windows