Merge branch 'master' of trac.42cc.co:ucsc-cghub
ticket:239 Wrote filter and tests for it
ticket:231 more subdirs for cart cache
ticket:231 edited cart cache documentation
ticket:239 Fixed both parsers
Merge branch 't231_divide_cacrt_cache_into_subdirrectories_to_improve_performances'
Merge branch 'master' into t239_reverse_not_found_for_4df3
ticket:239 optimisations in sax parsers code
Merge branch 't239_reverse_not_found_for_4df3'
ticket:220 fixed flexigrid.js to save columns width in cookies
Merge branch 't220_column_vidth_adj_lost'