implemented jdbcoutputformat
moved jdbc into new project, adjusted for 0.5

Conflicts:
	stratosphere-addons/jdbc/pom.xml
	stratosphere-addons/jdbc/src/main/java/eu/stratosphere/api/io/jdbc/JDBCInputFormat.java
	stratosphere-addons/jdbc/src/test/java/eu/stratosphere/api/io/jdbc/JDBCInputFormatTest.java
Conflicts handled by @rmetzger
renamed jdbc package properly to the new 0.4 naming conventions
added batch interval to jdbc; fixed issue with jdbc test cases