Merging development branch into master

Merging the myCBR-3.0.1 development branch into master (released)

See merge request !13

This reverts commit cd4b71ed.

Resolved Conflicts:
	src/test/junittest/similarity/StringFunctionTest.java

Feature Test Loading Tax

Added Performance Testing for Taxonomies

* Extended test harness including symbolic value ranges
* Added test that measures loading times for projects with taxonomies

Czempisz

Added Log4j libraries and changed SysOut in line 126 in DataBaseImporter.java to Logger.

* Extended test harness including symbolic value ranges
* Added test that measures loading times for projects with taxonomies

Feature Test

Merge Test. unused attribute removed

String Similarity Measure Test

Added test for the string similarity measure that target Issue #2. However, I could not verify the problems.

* Added tests for String similarity measure
* Trying to verify mycbr/mycbr-sdk#2

* Added class that tests retrieval performance
* Renamed StressTests to StressTestsLoading for clarity
* added tmp/ folder which is required for the performance tests

* moved tests in a separate folder, so they can be excluded from the jar
* fixed all failing tests
* includes tests that were excluded after API change (Test1000, TestTrigram, project loading)