prepare for 0.12-rc7
remove deprecated junit Assert imports
Assert fix
fix javadoc
do not run expensive JDBC query if FILEMOVES table is empty or tracking of renamed files is off
this works around #774
Merge pull request #780 from vladak/union_workaround

do not run expensive JDBC query if FILEMOVES table is empty or tracking ...
fix -r dirbased for remote repositories which cannot get have per-directory history
Merge pull request #781 from vladak/dirbased_logic_fix

fix -r dirbased for remote repositories which cannot get have per-direct...