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

Fix SQL Server drivers and functional test suites

Fix statement for getTableWhereClause method

If you have a role "postgres" in PostgreSQL that is described like this:
```
-- Role: postgres
CREATE ROLE postgres LOGIN
  ENCRYPTED PASSWORD 'md53175bce1d3201d16594cebf9d7eb3f9d'
  SUPERUSER INHERIT CREATEDB CREATEROLE REPLICATION;
ALTER ROLE postgres IN DATABASE sf_test
  SET search_path = "$user", public, access, geographic, rrhh;
```

At the time when I execute the statement (Part of $schema value in the line 348):
```
SELECT string_to_array((select replace(replace(setting,"$user",user),' ','') from pg_catalog.pg_settings where name = 'search_path'),',')
```
I fetch this result:
```
{public," access"," geographic"," rrhh"}
```
Look the space character that is on the start of each string.This error does not match any namespace to which the role has access. This is critical when you have PostgreSQL database and you work with schemas.