Added minor documentation and credit to Wikipedia and Khan Academy in loadpath/modular.rb
Added loadpath/basemath.rb for dealing with integers in different bases
Added loadpath/blockify.rb for conversion of strings to arrays of integers and back
Modified blockify.rb
Modified loadpath/polynomial.rb
Edited loadpath/rsa.rb to encrypt in blocks to prevent frequency analysis
Removed rsa/test.rb, it is no longer necessary
Changed name of #execute method to #exec and modified documentation