Use the wiki to describe common usage patterns

[fpoirotte]

I noticed most people using phpfarm do not use it the way I thought they would/should. I think it's important to document common usage patterns. The github wiki may be a good place to start.

Things I'd like to see documented:

• Customizing the options: most people tend to fork the repository and edit the scripts. This is however not required.
• Installing PEAR packages.
• Compiling PECL extensions. While there have been several documented ways to compile PECL extensions in the original project (http://cweiske.de/tagebuch/phpfarm-install-extensions.htm, cweiske/phpfarm#1, etc.), people still struggle with that. In most cases, compiling a PECL extension requires only a single command.
• Managing versions / getting rid of old versions.

Feel free to suggest other topics you'd like to see documented too.

[nenadalm]

Probably would be also good to add script to remove old version (specified as argument) with post-remove.sh script to get rid of stuff added in post-install.sh

[nenadalm]

something in manner of https://github.com/fpoirotte/phpfarm/pull/10