Adding a SortedIteratingSystem and unit tests
Entity id generation bound to engine.
Family Builder Pattern
ImmutableArray implements Iterable
Merge pull request #86 from Lusito/SortedIteratingSystem

Adding a SortedIteratingSystem and unit tests
Adds tests for ImmutableArray, mostly iteration
Unit test for double entity removal
Merge branch 'master' of https://github.com/libgdx/ashley into entity_id

Conflicts:
	ashley/src/com/badlogic/ashley/core/Entity.java
Merge pull request #100 from Lusito/familybuilder

Family Builder Pattern
Merge pull request #94 from Lusito/entity_id

Entity id generation bound to engine.
Merge pull request #109 from Lusito/scheduled_for_removal

Unit test for double entity removal