Merge pull request #57 from jwhonce/dev/wip

WIP Cartridge Refactor - Fix oo_spawn when giving uid:
Add private-endpoints conceal check for plugin.feature
Merge pull request #58 from pmorie/dev/cartridge_refactor

Add private-endpoints conceal check for plugin.feature
Remove unnecessary FrontendHttpServer calls in cart model
Merge pull request #59 from ironcladlou/dev/cartridge_refactor

Remove unnecessary FrontendHttpServer calls in cart model
Add openshift config for php.
Merge pull request #60 from mrunalp/dev/cartridge_refactor

Add openshift config for php.
WIP Cartridge Refactor - Deploy Application Repository/ERBs

* relax cartridge permissions
* more error checking
* deploy application repository to app-root/runtime/repo
* add support for shared opt directory