[Runtime] [Adapter] put the constructor method first in the list of methods.
[Runtime] [Connection] minor simplifications.
[Generator] [Manager] fixed wrong property name in AbstractManager class.
Added possibility to apply "LIMIT 0" in PostgreSQL adapter

This is possible in Postgres and may be useful. "OFFSET 0" seems useless but I think it should be added for consistency.
Squashed the commits
Failing test for toArray withColumn

Resolving bug toArray withColumn

Corrected indentation
Merge pull request #405 from geryjuhasz/toArraywithColumn

forward port "To arraywith column bug fix"
Merge pull request #403 from hhamon/abstract_manager_typo

[Generator] [Manager] fixed wrong property name in AbstractManager class...
Merge pull request #402 from hhamon/various_fixes

Various fixes
removed un-used PdoConnection class
added new transaction API. added initial tests.
Update composer, fix #407
Fix the brases to new line
Merge pull request #412 from harikt/nosquash

Sorry no squash, it is easy to start a new branch and work.
Use fenced code blocks instead of highlight tags

Rely on Markdown's fenced code blocks instead of Jekyll Liquid tag
Update informative files

Update files for contributors and/or readers such as the index file
and the contribution file
Update the configuration for fenced code blocks

The fenced code block syntax is provided by Redcarpet so the Jekyll's
configuration should be updated to make them work and also ensure the
site looks the same at some levels (e.g.: tables)
Fix various typos and deprecated code in guides

Update the typos in most guides and also update or remove some
deprecated code.
Merge pull request #316 from robin850/master

Documentation update
Fixed test:prepare params for Postgresql

I don't know if anyone has run the tests, but I'm unable to pass the preparations. The tables are duplicated in each schema, they have multiple primary keys which are not included in foreign keys... Even after fixing the schemas, I receive fatal:
``
Propel\Generator\Exception\EngineException: Table "book" declared twice
``
port PR #704 from Propel 1.6