ctd: scrub pathway ids; add properties; fix prefixes
ctd: scrub pathway ids; add properties; fix prefixes

* scrub some silly uninformative pathway ids.  addresses #175
* add properties to parse() function to speed up processing
* fix some pmid and omim uris that were getting double-curies.
* a little bit of formatting cleanup

TomConlin/dipper,monarch-initiative/dipper,monarch-initiative/dipper,TomConlin/dipper,monarch-initiative/dipper