Default fetch mode for Connection and fixing it for Statement classes

[DBAL-178] Fixed an undescriptive error message and a problem when using custom types and their reverse engineering from the database. Allows Type#getMappedDatabaseTypes() to be implemented in custom types, mapping to vendor database types during reverse engineering.

Sharding

[SQLITE] Remove primary key auto quote

Should be updating $this->_keywords.

Prevent repeat instantiation of reserved keywords class

Fix the repeat calling of getReservedKeywordsClass() that causes a considerable slow down when running lots of migrations.

added simple_array type

[Platform] Allow a string to be passed as type

Fixed conditional expression

Update license for Composer

changed some phpdoc's,  set correct namespaces and types