Add ability to send edited file contents to another server

When user will press 'Submit Build', the edited file contents will be sent to
the other server responsible for builds.

User will have option to not send the edited file contents to the other server
via a checkbox option.

When the user will move the package having the edited file contents to the
'Finished' state, the edited file contents will be deleted from ETT's database.
Some error checking
Merge branch 'master' of github.com:liweinan/ett into maven-build-arguments
Merge pull request #164 from thescouser89/maven-build-arguments

Add ability to send edited file contents to another server