Removed note about to be implemented ghost proxies

Ghost proxies are availabe since release of 0.4
Pronounce the heavy initialization in value holder proxy examples

The old example did not show the actual benefit
Merge branch 'documentation/ghost-proxy-note-removal'
Merge branch 'documentation/pronounce-heavy-initialization-in-virtual-proxies'
Update access-interceptor-scope-localizer.md

Corrected what is probably a mistake.
Merge pull request #138 from guilro/patch-1

Update access-interceptor-scope-localizer.md
Bumping master to `0.6.x-dev` alias
Locking PHPUnit version to 3.8 due to Ocramius/ProxyManager#140
Merge branch 'hotfix/build-failures'
PHPUnit 3.8 does not work on PHP 5.3 - allowing PHPUnit 3.7 too
Moving lazy loading constructor to its own class to remove duplication
Moving tests for the lazy loading constructor to their own namespace
Removing code duplication
Merge pull request #142 from Ocramius/hotfix/duplication-removal

Minor code duplication removal
Applying workarounds for HHVM compatibility
HHVM does not report memory usage with enough detail - fixes division by 0 cases
Applying automated CS fixes
Merge pull request #143 from Ocramius/hotfix/cs

Applying automated CS fixes
Merge pull request #141 from Ocramius/hotfix/hhvm-compat

Applying workarounds for HHVM compatibility
Removing potential bug caused by invalid `static` keyword usage