Add time configuration to the layers and groups
Add more details about OWSLib handling of wms_timedefault
fix tests for python 2.6
improve unit test coverage
dos2unix on test_wmtsparsing.py
Run setup.py extract_messages
Run setup.py update_catalog
Fix flak8 in wmstparsing tests
Merge pull request #687 from vicb/timeslider

Add WMS layer time information to the tree