shifted the update_overrides method out of build and into the parsers

- per Filip's feedback shfted the update_overrides() into
update_project and out of build.js
- added util.deleteSvnFolders to update_overrides()
added merges tests

- added tests for merges to buid.spec to watch for the update_overrides
method to be called.

- added tests to individual parses to ensure that the copys process
correctly

- added merges directory to bootstape for use in fixtures