- Added support for tilde expansion
- Added support for relative paths
- Always return absolute paths for the Podspec.

This was caused by not reloading the user project from disk and losing
previous changes done to the same project.

* integration_take_2:
  [Integration] Fix YAML representation

Conflicts:
	spec/integration/install_subspecs/after/execution_output.txt

* integration_take_2:
  [Integration] Isolate from spec helper and clean up Rakefile
  [Integration] Update install_subspecs
  [Examples] Updates lockfiles.

Conflicts:
	examples/AFNetworking Mac Example/Podfile.lock
	examples/AFNetworking iOS Example/Podfile.lock
	examples/TargetTest/Podfile.lock
	spec/integration/install_subspecs/after/Podfile.lock

* integration_take_2:
  Make Integration tests more robust

Conflicts:
	Gemfile.lock
	spec/integration/install_add_pod/after/Pods/Pods.xcodeproj/project.pbxproj
	spec/integration/install_add_pod/after/execution_output.txt