update for memcache 3.0.8
update for mongo 1.3.7
Merge pull request #87 from remicollet/issue-ext01

New extension versions
update mongo reference to 1.3.7
update mongo reference to 1.3.7
new extension varnish
second snapshot of version 2.15
PHP 5.3.24 and PHP 5.4.14 are already out
update docs for stable release 2.15.0
stable release 2.15.0 is out