Improve database schema, implement multi linguage and some fixes

[williamespindola]

Added:

• Multi language support #24
• Refactoring cli Create class to work with language
• Add option via cli
• Add language via cli
• Update mysql schema with new schema without collection and field many to many relationship
• Improve readme Fixed:
• option word is reserved on mysql #18
• Config path on WilliamEspindola\Field\Console\Command\Database\DoctrineStorage
• getMapperInstance method on WilliamEspindola\Field\Console\Command\Database\DoctrineStorage must return instance of WilliamEspindola\Field\Storage\ORM\Doctrine not mapper Removed
• Remove collection and field n to n relationship #25

close #25 close #24 close #18