create an abstract class for the offline wordsmanager
chanegd to extends OffLineWordManager
test for interface
added SQL test
Merge branch 'test_1' of https://github.com/sebastienjean/iutvalence-java-mp-2013-2014-in-p3.git into test_1
Merge branch 'master' into test_1

Conflicts:
	src/fr/iutvalence/java/mp/thelasttyper/client/data/wordsmanager/TextfileWordsManager.java