fix containment bug for filters

this occurs if one filter is contained in (infix) another filter:
foo,foobar... if you select foobar foo is found and set active in interface as well
Merge pull request #183 from joernhees/fix_filter_by_link_containment

fix containment bug for filters
Bumped pre-release version
Added check for taken username in User
Renamed kwgs to kwargs (fixes #185)
Added ancestor as argument in get_dbs
Update base.py
Merge pull request #187 from topless/patch-2

Added ancestor as argument in get_dbs
Bumped release version
Merge branch 'master' of github.com:gae-init/gae-init

* 'master' of github.com:gae-init/gae-init:
  Update base.py
  Added ancestor as argument in get_dbs
Merged with gae-init