Critical path
Little improvements
Writes .dot file

Writes .dot file (without critical path yet as not excist)
(cherry picked from commit 35c9ea9)
Modified formating
Writes .dot file

Writes .dot file (without critical path yet as not excist)

(cherry picked from commit 35c9ea921e85427e859074d4aac44c805c51fc43)

Conflicts:
	src/ee/ut/sm/pert/AssignmentPert.java
Merge branch 'master' of https://github.com/p2tris/pert

Conflicts:
	src/ee/ut/sm/pert/AssignmentPert.java