Update .gitignore
Update composer.json
Move AuthorizeNetException
Update test config
Update documentation
Add SPL autoloader and classmap

Fixes #14
Integration test cases for:
•	Support for Subscription Info in Reporting API
•	Support for ReturnedItems in Reporting API
•	Support for SolutionID in Reporting API

There is no need in SDK code change since PHP SDK structure is flexible with
API changes at backend.
Merge pull request #16 from texdc/composer_autoloading

Update autoloading
Merged new tests
Fixed some tests
Merge branch 'ncpga-master'
Add proper markdown to format code blocks

I added the required markdown to format the sections of code as proper code blocks. I'm currently trying to implement this feature in my site, and the documentation is painful to read.

I'm only using this doc page at the moment so I haven't formatted the others, but I'd be happy to do that when I have a minute if you'd like.
Update AIM.markdown

Update AIM docs so code blocks are more readable
Update ARB.markdown

Update ARB docs so code blocks are more readable
Update CP.markdown

Update CP docs so that code blocks are more readable
Update DPM.markdown

Update docs so inline code is more easily recognized
Update SIM.markdown

Update SIM markdown so code blocks are more readable
Update TD.markdown

Update TD markdown so code blocks are more readable.
Update AIM.markdown

add PHP flag for syntax highlighting
Update ARB.markdown

Add PHP flag for syntax highlighting.