Add check test and use the `lenght` method
Validate the schema definition given to the SimpleSchema constructor
Merge pull request #16 from mquandalle/tests

Add check test and use the `lenght` method
Add unique and autovalue in the validation of the schema definition
Add support for additionalKeyPatterns
Merge remote-tracking branch 'origin/master' into validate_schema
Remove var
Merge pull request #15 from mquandalle/validate_schema

Validate the schema definition given to the SimpleSchema constructor
merge changes from master
merge changes from master