Fixing Test For Data not fitting in a block

    * Added additional check for data length before writing to block
    * Fixed the "exceedingBlockSizeTest"
Merge branch 'Fix_BrokenTest_For_DataSizeExceedingBlockSize'

Conflicts:
	src/main/java/de/jhoff/dmap/DMapBuilder.java
	src/test/java/de/jhoff/dmap/DMapBuilderTest.java