Update README.md
Small Structural change;
SOme unused imports removed
Small Structural change;
Small Structural change;
Small Structural change;
Small Structure Changes
fixed conflict!
Small Structural change;
More Alloy specific operations now encapsulated.
Fixed Merge
Fixed return null;
bug fixed2
Merge branch 'v0.3' of https://github.com/haslab/echo into v0.3
can't update when opposite inconsistent
minor fixes
Some work on Runners
persistent properties
removed doc
fixed issue with paths containing _
examples clean up