support schema creation for psql platform

Add hour to DATE_ADD and DATE_SUB

fix some files mode bug 755->644

Update DecimalType.php

The "decimal" mapping type does not map to float/double anymore:
https://github.com/doctrine/dbal/commit/9f51afa210d5c0165dfe6c622e07e42aa54c09fb#lib/Doctrine/DBAL/Types/DecimalType.php

Thank you.

Fixed PRAGMA calls that were missing quotes for non-standard table names

Fixed typos in code samples

The method executeCachedQuery was being called rather than executeCacheQuery.

Update SQLServer2008Platform.php (support  MS SQL Server type datetimeoffset(6))

Added support of  maps a Doctrine datetimetz type to a MS SQL SERVER type datetimeoffset(6)

Removed an unused method in AbstractPlatform.

Documentation fixes

- Fixed docblocks
- Removed return statements on void methods
- Cleaned up unused private / local variables
- Fixed license issues
- Removed SVN leftovers
- Fixed doctrine-project.org links
- Added line breaks before return statements

Fix foreign table name quotation in schema table and Sqlite platform

Introduced BC break with databases that switch from case-insensitive
to case-senstive handling when identifier quoting is enabled.

This reverts commit 11111bd7.

Quoting table name

[DBAL-374] Fix asset identfier quotation