Merge branch 'master' of https://github.com/thiagomp/PHPSchemaManager.git

Conflicts:
	tests/SchemaManagerTest.php
Added a way to tell the library to work with only one Schema
- testing TEXT fields
- Created a test for TEXT fields that are committed to the database
- Created a method to report the database version
- Created a SchemaTest class and moved a method from the ManagerTest to there
- Added a drop function to all objects
- Considering the port of the database connection
- Fixed issue that happened with Linux when creating the table
- allowing Schema objects to execute a flush
- updated the sandbox scripts to use the flush from the Schema