remove comment
fix column comment functional test
fix sqlsrv driver functional test suite
skip pdo_sqlsrv varbinary/blob tests for now due to a driver bug
fix SQL Azure functional tests
fix bindParam signature in PDOStatement to avoid errors in pdo_sqlsrv
mention pdo_sqlsrv driver limitations with binding values to varbinary/blob columns
add sqlsrv driver to configuration documentation
fix skip message
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.
Merge pull request #492 from sinner/patch-1

Fix statement for getTableWhereClause method
Merge pull request #491 from deeky666/fix-sqlsrv-drivers-test-suite

Fix SQL Server drivers and functional test suites