Make imagemagick library script executable
Add libraries and extensions:

* ext/igbinary
* ext/libevent
* ext/phalcon (older version 1.2.3)
* libyaml and ext/yaml
* freetds
Enable pdo-dblib in php configure line
Update PHP build deps to include freetds
Update all PHP build deps to include freetds
Re-set executable bit on php script files
Add ini files for added extensions
Compile nginx with 'stub status' module
Allow S3_URL override, add lame version-check, don't fail when running in-place
Update README