enable multiarch lib location

Cherry picked from ubuntu lucene++ package
Update LuceneTestFixture.cpp
Update LuceneTestFixture.h
Merge pull request #61 from LocutusOfBorg/patch-1

enable multiarch lib location
Merge pull request #62 from LocutusOfBorg/patch-3

Update LuceneTestFixture.cpp
Moved Subversion requirement outside CMakeLists