Rename BDF methods.

briar-api/src/org/briarproject/api/data/BdfDictionary.java

briar-api/src/org/briarproject/api/data/BdfList.java

briar-core/src/org/briarproject/forum/ForumManagerImpl.java

...e/src/org/briarproject/forum/ForumSharingManagerImpl.java

.../src/org/briarproject/messaging/MessagingManagerImpl.java

...briarproject/properties/TransportPropertyManagerImpl.java

briar-tests/src/org/briarproject/data/BdfDictionaryTest.java

briar-tests/src/org/briarproject/data/BdfListTest.java

.../org/briarproject/data/MetadataEncoderParserImplTest.java