Working on first detailed tutorial
Revert "GMP and BC Math signature code generates different signatures"
Merge pull request #117 from bitpay/revert-115-TestingMathLibrariesSig

Revert "GMP and BC Math signature code generates different signatures"
Done with the first and second examples
Updated so the objects are echo'd since xdebug will limit the output and I want it to show the entire output
Added final example of how to create an invoice
Merge pull request #118 from JoshuaEstes/AddedDetailedTutorial

Added detailed tutorial