32 refactor conversion code

[nmmull]

• The lib file is pretty much empty at this point. I think this is generally a good thing, though perhaps a bit silly looking for now. I imagine as the project progresses the lib file will contain versions of functions that we want to expose to the user.
• The updates to convert ended up needing to be a bit more complicated than anticipated. Long story short, the ERROR submodule for a given module should be reserved for fatal errors and, in particular, it should only be returned, not handled internally. For now the nonfatal errors are handled by a try catch block, and I may eventually port my LOG abstraction to this part of the project as well if we find that it is sufficiently useful.
• Please look carefully at the new version of acopy and amap. I tried to maintain the content of the code while changing the structure, but it might be good to verify that I was successful in this.
• Also note the changes in the signature CONVERT.

Generally speaking, I think this is a good baseline for starting testing on individual emails. With everything refactored it should be easier to isolate any necessary changes.

[nmmull]

Also included a unit test file to get everyone started.