added MapEmitter draft
implemented new MapReduce
added MapEmitter to API
improved map_reduce tests
remove conditions from MapEmitter
added return self to some MapEmitter funcs
returned conditions to MapEmmiter funcs
min
min
renamed raise_exception to raise_
added FindFilesCall stub
started to rebase FindFiles on new MapReduce
added RenderFileCall and InputCall to corr APIs
upd findtools API
updated find_files_Test
removed all map_reduce.BREAK_* from findtools
rebased find_files on new MapReduce
min
added FindStringsCall stub
rebased FindStrings on new MapReduce