Meilenstein 8 und weitere Testcases hinzugefügt

build.xml

src/Main.java

src/idb/buffer/DBBuffer.java

src/idb/buffer/SimpleDBBuffer.java

src/idb/construct/Util.java

src/idb/datatypes/DBInteger.java

src/idb/datatypes/DataObject.java

src/idb/datatypes/IntegerData.java

src/idb/example/SeqRecordFileExample.java

src/idb/meta/FileCache.java

src/idb/meta/Metadata.java

src/idb/record/KeyRecordFile.java

tests/AbstractBufferTest.java

tests/HashTest.java

tests/TIDTest.java