Path method refactoring
Default value for options param in getPath method
Add slack test
Add instagram
Add flickr
Add trello
Add asana
Add mailchimp
Add heroku
Fix asana
Add dropbox
Improve docs
Test different api domain and path
Image upload for flickr
Upload avatar image for foursquare
Image upload to asana
Add link to the upload examples
Upload file to slack
Improve file uploading
Fix multipart test