Add Header class
Parse both comments and keypairs in info block
Modify Script.header to deal with the array
Add ability to pass object to Script.header to modify multiple keys
Modify Script.to-ass to output headers properly
Fix header output
Trim whitespace from script on export
Merge branch 'master' into array-header
Add mocha options
Remove reporter from mocha.opts
Add mocha and chai to dev dependencies
Make npm test run mocha
Merge branch 'master' into array-header
Add header test file
Add header equality test
Merge branch 'array-header'