Adding failing test demonstrating DCOM-175

Private properties of parent classes are not serialized correctly, therefore PHP throws a notice during serialization
Applying fix for DCOM-175 - __sleep now returns correct property names
Reducing special checks for serialized properties to private props
Merge pull request #245 from BenMorel/master

Documentation fixes
Update EventManager.php

Remove gender bias from method description.
Merge pull request #287 from leedavis81/patch-1

Update EventManager.php
Merge pull request #284 from Ocramius/DCOM-175

DCOM-175
Fixed html_errors overwriting
Merge pull request #290 from horsik/master

Fixed html_errors overwriting
[DDC-717] Add eval() and FILE_NOT_EXISTS strategies for proxy generation.
[DDC-717] fix unfortunate typo
Fix .travis.yml
Delete unnecessary travis file
[DDC-717] CS adjustments and typos
Merge pull request #291 from doctrine/DDC-717

[DDC-717] Add eval() and FILE_NOT_EXISTS strategies for proxy generation
Update branch alias to 2.5-dev
Merge branch 'master' of github.com:doctrine/common
Reimplement build process

- Introduce Composer Archiving for release packaging
- Replace Phing build.xml with Ant implementation
- Removed PEAR package building
Fix bug in build.xml
Proxies shouldn't serialize static properties in __sleep()