Issue #212 - Make (once) the default multiplicity of @import
Issue #213 - Fixed order of imported files for @import (once)
Merge pull request #214 from Doccrazy/master

Fix for issues #212 and #213
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Added unit tests for detached rulesets. #186
Allowed detached rulesets calls from top. #186
Allowed all types as indirect variables. Close #216
raised
snapshot
Better debug to strings for structures and added scope to expressions.
Related to #186