directory & file based projects full support:
choose type on creation (directory based by default)
quick tree in OpenMPSProjectAction
can open only project dir/file from OpenMPSProjectAction
fix project creation tests:
create tests for both file based and directory based cases
fix git clean ant task
migrate mps project to directory-based format
rebuild tests contains 'MPS.mpr'
migrate all other *.mpr projects to directory-based format
Merge branch 'master' into 3.0/victor/bugs
fix MPSPlugin
fix tests
Merge branch 'master' into 3.0/victor/bugs
MPS-17678
Merge branch 'master' into 3.0/victor/bugs