starting explicit homset
factored out homset-condition in precategories.v
made some more files compile
finished transition for RC, need Kt
further in Ktheory transition
some more work in Ktheory, blocked in RawMatrix
Merge remote-tracking branch 'upstream/master' into hom-hset-explicit
Ktheory compiles
new def of iso, stuck in functors_trans
made functors_.. compile again
everything compiles
removed print statements
removed comments
reactivated old isos as 'z-iso'
fixed two lemmas in Ktheory
fixed opp-opp-precategory proof in Ktheory/Precategories
fixed opp-opp-precategory proof in Ktheory/Precategories, less weirdly
factored out a lemma
added a description about new isos, improved on implicit arguments for passing between old and new isos
Merge pull request #56 from vladimirias/master

Overhaul: uu0 split into uu0a, uu0b, uu0c, and uu0d.