Change advertised default property type to string
remove errant files
add ability to get version info

html info and version string of geoserver
add tests, too
support for layergroups in 2.3, refs #47

the xml changed slightly, this depends on the version PR #46 to
provide fallback support for 2.2
Merge pull request #44 from ischneider/minor-cleanup

remove errant files
Merge pull request #46 from ischneider/get-version

add ability to get version info
Merge pull request #48 from ischneider/2.3-layer-group

2.3 layer group
Updated Coverage class to match FeatureType configuration for 'advertised' property
Merged branch 'master' of https://github.com/boundlessgeo/gsconfig
Merged branch 'master' of https://github.com/boundlessgeo/gsconfig
Merged branch 'resource_advertised_default_fix'