Merge pull request #5 from pbhandari/Caesar

Change include path to be more resilient
merged python Caesar exploits with caesar
Merge pull request #6 from pbhandari/Caesar

Update README.md to include phar.so requirement.
created etc directory, added Alphabet directory
Python implementation now uses Caesar
fixed spelling error
implemented the Java alphabet class updated the tests.sh to account for new file
Added Ruby Sanity check tests
added the ruby alphabet and implemented Caesar using it, needs to be re-worked to use native methods
added PHP implementation of alphabet and integrated into Caesar