added rules-model
added rules-model to karma
added task unittests to grunt
updated report-model
fixed excel grammar for functions
load rules-model for tests
added unit tests to test Rule model
fixed jshint errors
Merge branch 'cellfire' of github.com:28msec/nolap-report-editor into cellfire-d-tests

Conflicts:
	Gruntfile.js
Merge branch 'cellfire' of https://github.com/28msec/nolap-report-editor into cellfire-d-tests
added rules-model to index.html
added validation of AST in rules test
fixed jshint warnings
Merge branch 'cellfire' into cellfire-d-tests
Add dependency
Merge branch 'cellfire-d-tests' of github.com:28msec/nolap-report-editor into cellfire-d-tests
Merge pull request #10 from 28msec/cellfire-d-tests

added unit tests to test Rule model