added threaded indexing
switch to threadsafe long
concurrent hashmap
fix for hashmap support
operation fix
atomic operations on entity
copy constructor
fix
sync toString
sync fix for some hashsets with Collections
1 more synced set
fix
fixed threading errors and synced commits
multi-threaded version
added threaded indexing

Conflicts:
	src/main/java/org/sindice/siren/index/IndexingMMLab.java
Merge branch 'master' of https://github.com/laurensdv/eic-entity-tool into single

Conflicts:
	src/main/java/org/sindice/siren/index/Entity.java
	src/main/java/org/sindice/siren/index/IndexingMMLab.java
	target/classes/org/sindice/siren/index/Entity.class
	target/classes/org/sindice/siren/index/IndexingMMLab$1.class
	target/classes/org/sindice/siren/index/IndexingMMLab.class
	target/classes/org/sindice/siren/index/Utils.class
changes to .gitignore