Fix bug: Uri.fromString is crash, when it receive some path ended with "/"
fix typo
Remove extra module name prefix.
Merge pull request #49 from mzp/fix_uri_multi_segment

Fix bug: Uri.fromString is crash, when it receive some path ended with "/"
Use git pull instead of git clone, if it can.

To do this, use ./github_repos instead of /tmp for working directory.