exclude points that lead to a content
more docu for facMul
deleted some unnecessary const
moved docu from .cc to .h
more docu in cfModGcd.h
docu for coprimality check
more docu in facBivar.h
deleted some redundant code
more docu for cf_map_ext
added operator== to lists
added Union, Difference, find which take an additional equality comparision function
instantiated templates with List<CanonicalForm> as typename
replaced isSame, isMember, MyUnion, minus by new templates
switch to old resultant algorithm if there are no primes left
update test results for Long/gcdp_l.tst
fix: template instantiations
Merge pull request #639 from mmklee/docu

Docu+charsets