[Rakefile spec:rebuild_integration_after_folders] clean hg source
[Project] Don't duplicate file references
[Integration Spec] Remove rendundant tests
[FileReferencesInstaller] Link headers globally, for now.
[Integration] Fix YAML representation
Merge branch 'integration_take_2' into 0.17

* integration_take_2:
  [Integration] Fix YAML representation

Conflicts:
	spec/integration/install_subspecs/after/execution_output.txt
[Integration] Fix install_multiple_targets test.
[Integration] Move code around
[UserProjectIntegrator] Fix missing targets.

This was caused by not reloading the user project from disk and losing
previous changes done to the same project.
Move code around.
[Integration] Update install_local_source for 0.17
[Sandbox] Store information about external sources and local Pods
[Sandbox] Clean up implementation
[WIP] Start to fix hooks