API and m5nr updates

1. m5nr tools script, updated help text, renamed
2. api parent resource - added more static structs
3. m5nr api resource
  - bug fixes
  - option to use different m5nr versions (1 and 9) -> (mgrast prod and latest)
4. matrix api resource
  - option to filter feature abundances by taxa (level and names)
  - full annotation for feature (md5) metadata
  - properly pass error message in asynchronous mode