added docstring info about errors raised for About, Result, Score
allowed simplified import statements (from tincan import RemoteLRS) for external modules. Added package-level docstring.
simplified imports from tincan in test files
Update about.py
Update about.py
Update about.py
Update result.py
Update about.py
Update about.py
refactored so that documents can be imported directly from tincan; refactored docstrings and error messages to match new simplified import scheme.
fixed ':raises' -> ':raises:'
Merge pull request #74 from chaimleib-scorm/master

simplified imports from external modules; package-level docstring, other docstring edits