Update PHP versions to 5.4.15 and 5.3.25

Update PHP dependencies (intl, mcrypt, pcntl, pspell)

Update README
Updated sha1 hash for 64bit

To fix the following

```
brew install php53-ioncubeloader
==> Downloading http://downloads3.ioncube.com/loader_downloads/ioncube_loaders_dar_x86-64.tar.gz
Error: SHA1 mismatch
Expected: 67432f4b117cbd06b8e1297636bf3c0844b188da
Actual: 067c47387725db434ab0e7d486a2d6eff6fab37c
Archive: /Library/Caches/Homebrew/php53-ioncubeloader-4.2.2.tar.gz
(To retry an incomplete download, remove the file above.)
```
Added HEAD installation for dbase
remove unnecessary version number from geoip formula
make the version common for ioncubeloader
Added HEAD installation for libevent
Fix HEAD installation for lzf
Remove whitespace
no need to override the init method
reorder options
update php53-xhprof to better reflect php54-xhprof
scope the patch to leopard. Refs #549. Refs #543
inherit from the proper parent class