Add a dummy module to echo plugin to ensure it's not run on start-up
CB-6549 use relative path to link assets

Changed: Use relative path instead of absolute path, to link the
cordova-mobile-spec repository with the mobilespec project. This is needed
for Windows-based dev workstations.

github: close #59
CB-6550 added/updated README.md

Added: Requirements & instructions to use createmobilespec module.
Updated: project setup usage.

github: close #60
CB-6525 Assert that fs.root.toURL() does not use cdvfile:
Don't use new File or new FileWriter in tests. Use getFile() and createWriter().
CB-6491 add CONTRIBUTING.md
Restore change that was accidently lost in a pull request.
CB-6571 Add test for DirectoryEntry.toURL() having a trailing slash
CB-6583 Add file tests that have spaces in paths
Set VERSION to 3.5.0-rc1 (via coho)
Set VERSION to 3.5.0 (via coho)
Merged in cordova 3.5.x branch