Properly parse PR inclusion/exclusion filters in submodule merge

- Create deepcopy of filters dictionary for each submodule
- Look for "user/repoxx" pattern in "pr" field and each the submodule filter
- Parse any inclusion/exclusion arguments containing # as a PR number filter
Add info optional argument to scc travis-merge for debugging
Fix repo cleanup if --info is passed in travis-merge
Parse any dependency containing hash symbol
Add unit tests for submodule PR parsing in Merge and TravisMerge
Merge pull request #81 from sbesson/submodule_include2

Submodule inclusion in merge commands