Merge pull request #12 from ncsaba/add-config-file

Use a configuration file.
Merge pull request #18 from ncsaba/wdb-wrapper

Wdb wrapper
Merge pull request #19 from ncsaba/wdb-wrapper

arbitrary boolean tree support for writing regions/combinations
Merge pull request #20 from ncsaba/wdb-wrapper

wdb wrapper
Merge wdb-wrapper branch
Merge branch 'wdb-wrapper'
added WDB.hole method; update wdb_example.py to use python wrappers;