Checking in changes prior to tagging of version 1.5.2.
fixing PHP 5.3 compatibility
need apt-get update before apt-get install
Fix undefined pux_persistent_fetch symbol

Related to #57
Merge pull request #59 from jbboehr/php53

PHP 5.3 Compatibility
Hide build status
fixed compile error, include json extension in test suite if not compiled into php
add common php.ini for extension test
use PHP variable
added valgrind option to ext/run-test
fix memory leak
Merge pull request #60 from jbboehr/hotfix/compile-issues

Compile issues
accept a callable function to `Mux::mount()` which can build a child mux.
use array_merge_recursive_distinct to merge options in a way that's more desired.
support pattern in ->mount with static ->add properly.
Merge branch 'mount-pattern'