Fix #250: remove Configuration.java and configuration.properties, replaced by Settings.java

Conflicts:
	choco-samples/src/test/java/org/chocosolver/samples/CycleLtTest.java
	choco-samples/src/test/java/org/chocosolver/samples/PertTest.java
	choco-solver/src/main/java/org/chocosolver/solver/propagation/PropagationTrigger.java
	choco-solver/src/main/java/org/chocosolver/solver/search/bind/SearchBinderFactory.java
	choco-solver/src/test/java/org/chocosolver/choco/explanations/EqualXYCExplTest.java
	choco-solver/src/test/java/org/chocosolver/choco/explanations/ExplanationTest.java
	choco-solver/src/test/java/org/chocosolver/solver/constraints/binary/ElementTest.java
	choco-solver/src/test/java/org/chocosolver/solver/search/binder/ISearchBinderTest.java
	choco-solver/src/test/java/org/chocosolver/solver/variables/OffsetViewTest.java
	choco-solver/src/test/java/org/chocosolver/solver/variables/ScaleViewTest.java
Improve MDD API and add new tests

Conflicts:
	choco-solver/src/test/java/org/chocosolver/choco/checker/consistency/TestConsistency.java
	choco-solver/src/test/java/org/chocosolver/choco/checker/correctness/TestCorrectness.java
	choco-solver/src/test/java/org/chocosolver/util/MDDTest.java
#250: Settings extends now Serializable
Variable: remove deprecated methods
Conflicts:
	choco-solver/src/main/java/org/chocosolver/solver/constraints/set/PropIntEnumMemberSet.java
	choco-solver/src/main/java/org/chocosolver/solver/constraints/set/PropNotMemberSetInt.java
#248:  if statement replaceable with 'switch' statement
#248: StringBuffer may be declared as 'StringBuilder'
#248: Explicit type can be replaced with <>
#248: Replace for loop with collect
#248: Identical 'catch' branches in 'try' statement
#248: Possible heap pollution with varags
#253: fix bug
#255: add CHANGES.md
#241: prepare LICENSE in headers
Issue #241: change LICENSE headers in java files + reduce warnings

Conflicts:
	choco-solver/src/test/java/org/chocosolver/choco/checker/fmk/Test_Bools_Sets.java
	choco-solver/src/test/java/org/chocosolver/choco/explanations/SimpleExplanationTest.java
Fix #258
Create more test goups (correctness, consistency)
Fix #215: add TuplesVeryLargeTable
Update travis
merge with feature-expl (1/2)

Conflicts:
	choco-solver/src/main/java/org/chocosolver/util/graphOperations/dominance/LCAGraphManager.java