change base64 library so that it will not add newline when the string is too long; fix the encoding signature
Merge pull request #3 from yancoursera/base64-encoding-issue

change base64 library and fixed signature
Revert "change base64 library and fixed signature"
Merge pull request #5 from jasongoodwin/revert-3-base64-encoding-issue

Revert "change base64 library and fixed signature"