comments
improved memory management of URIs to process
improved logs & cleanup
Option to use mapdb to store large collections that wouldn't fit into memory.
Prevention for OutOfMemoryErrors; option is enabled by default
Merge branch 'master' into by-publishers

Conflicts:
	examples/sample-config.xml
	sources/src/main/java/cz/cuni/mff/odcleanstore/crbatch/config/ConfigImpl.java
	sources/src/main/java/cz/cuni/mff/odcleanstore/crbatch/config/ConfigReader.java
create non-exists directories in path of output files
updated sample-config to write to output/ directory
Merge branch 'master' into by-publishers