Now with arrays & loops

Similar items, such as elements, fonts, and special characters
put into arrays and looped though, making easier editing and cleaner
code.
Updated style for pre > code

Light text against dark background.
Updated method for getting post title & keywords

Use urldecode(trim(string_tags())).
No more peg_replace() either.

Also, currently has debugging for install form in place.
Updated README

Was missing line-break, causing things not to display as <pre><code>
Another README update

Formatting changes. Markdown can be unpredictable to me.