Cleaned-up code and dependencies.
Updated README
Decreased header level.
Decreased header level.
Merge branch 'cleanup' of github.com:Cognifide/Sling-Caching-Filter into cleanup

Conflicts:
	README.md
Fixed table & xml example.
Removed unused dependencies.
Added installation info.
Merge pull request #1 from Cognifide/cleanup

Cleaned-up README, dependencies & SCR comments