Fix undefined notices within MasterSlaveConnection

To fix the following notice-level errors:

Notice: Undefined property: Doctrine\DBAL\Connections\MasterSlaveConnection::$_conn in vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php line 154
Notice: Undefined index: slave in vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php line 165

Remove HHVM-nightly builds

This also simplies the allowed failures for HHVM

Revert the addition of the wrong bin script

Documentation & code styling fixes

template1 as default database for PostgreSQL

Pgsql connection test with charset parameter

Fixes #402 (https://github.com/doctrine/DoctrineBundle/issues/402) by connecting by default to 'template1' instead of the database with the same name as the user (Postgre default in case of no dbname).

fix incorrect ordering of columns in clustered indexes on sql server

Fix test failures on windows due to differing newlines

The bin/doctrine-dbal.php file is not an executable file. Adding them as a bin in composer.json means that any composer install will trigger changes in the source when using symlinks because of the chmod. This makes things a pain when installing from source.
Thus, there is no valid reason to add it. It is absolutely not necessary when using a composer install. The issue requesting it previously is actually an issue in Laravel which replaces the proxy file/symlink generated by Composer with a copy of the original file, which of course cannot work because of paths used in require. But copying a second file does not help for that (unless in very specific cases). It only moves the issue until the next require call.

Fix incorrect docblock in Connection.php

These events don't exist.

Can't use short array in php < 5.4

Fix for bad profiling data, showing an indefinitely long query

Fix DISTINCT queries with limit and no order on SQL Server 2012

Readme: nicer badges; cleanup, 2.3- dropped

Add a unit-test to verify that when statements throw exceptions, the logger still has stopQuery called.

allow hhvm/mysqli failure so poor travis can feel better

Ref https://github.com/doctrine/doctrine2/pull/1362

Is there any reason why coverage is not in here? Would be much more useful than dependency badge.

Add postgresql 9.4 for travis builds