Splitting module into separate includes

I like this module a lot, but I feel like it might be loading a little too much code per page load. I've split the module up into 5 include files (faq.admin.inc, faq.hide_answer.inc, faq.new_page.inc, faq.questions_inline.inc, and faq.questions_top.inc) in order to reduce the overall memory footprint of the module on non-faq pages. The reason for making a separate include file for each of the layouts is that it seems unnecessary to load code for 3 layouts that won't be used even on the actual faq page. Attached is the patch for this split.