[Sandbox] Got `pod` command without any args to work.
[Sandbox] Get `pod install` to work and run `rake examples:build` in the sandbox.
[Sandbox] Get Ruby paths the right way.
[Sandbox] Allow spec repos to be written to (update).
[Sandbox] Cleanup TODOs.
[Sandbox] No need to write the profile to disk, just use the `-p` option.
[Sandbox] Move TODOs to #939 and add some documentation.
[Sandbox] Add note about tailing system.log
[Sandbox] Allow all outbound network connections for now.
Add per-spec static library targets

Static library targets are created for each combination of user-target
and spec dependency.  This addresses issue #841, although likely not 
entirely.
Identify copy build phase by spec name
Only add a single Manifest.lock phase when dealing with multiple specs
Add specs to libraries for non-integrated targets
Merge branch 'master' into dedicated-targets
Support xcconfig files per Podfile target

Xcconfig files are generated for every library target and target 
defined in the Podfile.  However, only the Podfile target xcconfig 
files are added to the user project.  This required tracking all the 
libraries as well as the Podfile targets through the installation and 
integration procedures.
Error template questions left unanswered means the ticket will be closed.
[Config] Restore support for CocoaPods.podfile

Closes #1004
[Sandbox::FileAccessor] Add support for private_header_files

Closes #998
[Integration] Update fixtures
Release 0.19.0