added support for default providers
added java 6 support and v7 support lib
added a sliding drawer to select providers
allow the user to select roots instead of providers

as one provider might have multiple roots
added styling
added an adapter that wraps the backstack
Using the backstack adapter to fill the navigation drop down
automatically selecting the latest navigation entry
implemented navigation item click to go up the folder hierarchy
added icon in dropdown navigation for sub folders
updated versions
removed default provider and fixed a bug with going back from root documents
code cleanup
extended example activity to cover more use cases
returning uri from documents browser ui
renamed DocumentsProviderAdapter to NativeDocumentsProvider
added provider wrapper
updated README
updated README
Update README.markdown