update term and cache table generation
update term and cache table generation

- uses find_subclasses() and import_file()

lokik/sfepy,sfepy/sfepy,lokik/sfepy,vlukes/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,rc/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,olivierverdier/sfepy,lokik/sfepy,sfepy/sfepy,rc/sfepy,sfepy/sfepy,RexFuzzle/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,olivierverdier/sfepy,olivierverdier/sfepy,lokik/sfepy,vlukes/sfepy