Fix sqlite autoincrement detection

Refactor, consolidate and extend driver exception conversion

[DBAL-764] Document types / column usage properly

Add SMALLSERIAL type support on PostgreSQL 9.2 platform

[DBAL-752] Fix integer type declaration SQL on SQLite

Fix unique indexes in CREATE TABLE statements on SQL Anywhere

Fix table lock hints on SQL Anywhere

Fix modifying limit/offset for statements with subqueries on SQL Server

[DBAL-789] Fix default values for TEXT/BLOB column type on MySQL

Create the online table before listing it.

[DDC-2310] Fix evaluation of NOLOCK table hint on SQL Server

Exclude HHVM + PostgreSQL build matrix on Travis for now

Fix DataAccess test on HHVM

Add travis build matrix for all built-in PostgreSQL versions

Exclude HHVM + PostgreSQL and HHVM + Mysqli from travis build matrix

Add dependency badge to the README

Add missing type parameters to connection fetch methods