Merge branch 'hotfix/release-2.2.3'

2.2.3 release
Updated upcoming php-zf2 conferences
Add page for Zend_Config_XML-Namespace

See #zendframework/zf1/38
Merge pull request #116 from basz/patch-1

Updated upcoming php-zf2 conferences
[#116] fix parse errors

- missing commas between array entries
- remove commented conferences; that's why we have version control
Merge branch 'hotfix/116'

Close #116
Merge branch 'hotfix/116' into develop

Forward port #116
Merge pull request #117 from froschdesign/hotfix/zend-config-xml-namespace

Add page for Zend_Config_XML-Namespace
Merge branch 'hotfix/117'

Close #117
Close zendframework/zf1#38
Merge branch 'hotfix/117' into develop

Forward port #117
[2.2.4] Created release announcement
[2.2.4] Ready for release

- Prepared release artifacts
Merge branch 'hotfix/release-2.2.4'

2.2.4 release
Merge branch 'hotfix/release-2.2.4' into develop

2.2.4 release
Fix for #92 - Add component name/class name as headline to docs

The fix includes also an auto width for the select lists in manual (CSS).
Merge pull request #118 from froschdesign/hotfix/92

Fix for #92 - Add component name/class name as headline to docs
Merge branch 'feature/118' into develop

Forward port #118