Feature/add marathon support

[bidesh]

PR for issue #58.

[msiebeneicher]

bin/chapi configure: Please use a prefix like "GLOBAL", "CHRONOS", "MARATHON" for the configuration questions to make more clear what you are currently configuring

[msiebeneicher]

bin/chapi status : pls check the exception type or http status code if you use credentials which are wrong => http status code 403 Forbidden

[msiebeneicher]

bin/chapi validate .: the command is broken:

[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
  You have requested a non-existent service "jobrepositoryfilesystem".

[bidesh]

@msiebeneicher

• The configure command now looks like this:

  [GLOBAL] Please enter a cache directory:
  [CHRONOS] Please enter the chronos url (inclusive port):
  [CHRONOS] Please enter the username to access your chronos instance:
  [CHRONOS] Please enter the password to access your chronos instance:
  [CHRONOS] Please enter absolute path to your local chronos jobs configurations:
  [MARATHON] Please enter the marathon url (inclusive port):
  [MARATHON] Please enter the username to access marathon instance:
  [MARATHON] Please enter the password to access marathon instance:
  [MARATHON] Please enter absolute path to your local marathon tasks configurations:

• The dummybridge is only setup for ConnectException and RequestException. Details for these exceptions can be found here

• The validate command is fixed. The issue was incorrect service id.

• Added a fix for default values in MarathonApp property

[bidesh]

The build is failing because of hhvm. This issue was reported with facebook/hhvm#7622 . @msiebeneicher Is there any requirement why we should stick to hhvm 3.6.6?