SLICE-50: fixed XML schema version
Merge pull request #25 from Cognifide/slice-50

SLICE-50: fixed XML schema version
Revert "SLICE-49 removed unused ContextProviderFactory & friends"

This reverts commit b194eda86cb5834fd70cce0aba66fb3774036367.
fixed licenses in files removed in SLICE-49
merged SLICE-49 reversion
merged xml schema fix