Fix MemoizerTest.testSimple
Rename Formats BSD test suite
Add MemoizerTest to the formats-bsd test suite
Add tests for Memoizer.getMemoFile() with no directory
Add test for Memoizer.getMemoFile() with Java tmp directory
Add tests for Memoizer.getMemoFile() with non-existing directory
Add failing test for memoizer using the root directory
Fix Memoizer.getMemoFile() if the root path is the memo directory

Test should pass as the memo file should be in the same directory as the
original file.
Fix path joining in unit tests
Fix indentation
Add short comment describing the special case of the root folder
Merge pull request #1285 from sbesson/memoizer_getmemofile

Fix Memoizer.getMemoFile(id) when directory is the root path