minor clean up on the clip process
Merge pull request #538 from geosolutions-it/up-m

GEOT-4891, minor clean up on the clip process
minor clean up on the clip process
Merge branch 'master' of https://github.com/geotools/geotools into up-m
Merge pull request #539 from geosolutions-it/up-m

GEOT-4891, minor clean up on the clip process
Fix versions for maven quickstart
Update maven quickstart
Breaking up DataStore tutorial into seperate pages
Outline FetureSource / Reader / Factory
commit rest of outline from property datastore tutorial
Mark comments / text description documenting implemenation
Start cleaning up the FeatureStore story
Fixing NE download and note that CachingFeatureSource is deprecated (#542)

This resolves pull request https://github.com/geotools/geotools/pull/542
ContentFeatureCollection NPE with DataUtilities.collection (GEOT-4893)

See https://jira.codehaus.org/browse/GEOT-4893
Clean up a few comments
Second draft of CSVFeatureStore
CSVWriteTest
Updating csvreader dependency and clarifying instructions for test files
Adding clearer directory instructions for META-INF/services/org.geotools.data.DataStoreFactorySpi

Conflicts:
	docs/user/tutorial/datastore/source.rst
Adding reader method to instructions

Conflicts:
	docs/user/tutorial/datastore/source.rst