First try at a basic Read Manifest.  Need to refactor.
Updated travis to only test master and develop.
Can open manifest files.
Cleaned up docstrings and some references.
Method to parse hash name from manifest filename is now private.
Added tests for errors in manifest reads.
Fixed bagutil/checksum to single function.
Massive refactor for simplicity.
Massive refactor for simplicity.
Changed method name from bag.Close to bag.Save for clarity.
Fixed naming errors in bagmaker.
Improved test directory cleanup.
Fixed documentation link.
Added arguments for specific manifest and tagfiles to open.
Smart read of manifests enabled.
Improved test cleanup, fixed nil pointer in bag read test.
Finished opening bag.
Merge branch 'feature/openbag' into develop