Changes the psr/log version to avoid conflict with others projects.
Merge pull request #109 from Sukei/composer-log

psr/log to follow version 1.0
Added ext-pgsql as requirement for composer.
Added travis to master. Added Scrutinizer logo.
Updated documentation with 1.2 features.
Fixed tests on pg9.1.
Raised sleep time in observer test

This is to prevent test to fail on a first time run (ie travis).
Pg escape functions for PHP 5.3.
Escaping methods access to public.
Quote bug betwen old and new escaping functions
Merge branch 'composer-log'
Merge remote-tracking branch 'upstream/master'
Uses the createPreparedQuery factory method to create queries instead of instantiate them by hand.
Merge pull request #111 from Sukei/connection-query

createPreparedQuery factory method used for internal queries
BaseObjectMap to use identifier escaping.
Parse error with PHP 5.3 in BaseObjectMap.
Cleanup the code by removing unecessary blanks lines and unused properties.