Remove NSData+Base64 dependency, use builtin methods instead
Make sure to never pass nil to -[NSData initWithBase64Encoding:]
Merge pull request #18 from 0xced/base64

Remove NSData+Base64 dependency, use builtin methods instead
Set indentation settings to four spaces at the project level
Delete unused code
Use CoreServices/MobileCoreServices to determine if a recording is text

This will cover more cases than a fixed set of recognized text MIME types.
Update podspec with CoreServices/MobileCoreServices frameworks
Merge pull request #19 from 0xced/isText

Use CoreServices/MobileCoreServices to determine if a recording is text