#35 detailed error messages

[blicksky]

No description provided.

[blicksky]

I added test coverage for the changes to GalimatiasParseException as well as for when the different types of ParseIssue are used with URLParser. I didn't cover every usage, mostly because I wasn't sure how to construct URLs that would cause each issue in every case, so let me know if you'd like to see this filled out even further. Also, let me know if you see a better way to test what I was trying to do in ParseIssueTest.

I had specifically avoided using method names like throwError and throwFatalError because an exception is not always thrown, depending on the ErrorHandler. I switched to use "handle", as in handleError and handleFatalError to avoid any confusion between overloaded terms like "raise" or "throw".

[coveralls]

Coverage decreased (-0.27%) when pulling 7f8da49 on blicksky:#35-detailed-error-messages into 649b1fd on smola:master.

[smola]

Here the error should be thrown so that parsing stops.

[smola]

Implementation and tests are good. I'll add some further cases later. Could you address my comments and squash all changes to a single commit?

[coveralls]

Coverage increased (+0.21%) when pulling 4140309 on blicksky:#35-detailed-error-messages into 649b1fd on smola:master.

[coveralls]

Coverage increased (+0.21%) when pulling e0fe1d2 on blicksky:#35-detailed-error-messages into 649b1fd on smola:master.

[smola]

Thank you @blicksky! I have merged this PR to a branch: https://github.com/smola/galimatias/tree/feature/issue-35

I will merge to master once I'm sure all cases are covered.