Merge pull request #4 from xiazek/master

When raising exceptions, always passing an exception class.
fixed response from api caller parsing
Merge branch 'master' of github.com:Instalytics/instagram_reporter
bumped version
extracted InstagramApiCaller#instagram_api_get_method to avoid duplication
InstagramApiCaller code cleanup
InstagramApiCaller rescue on api calls moved to a single place
InstagramApiCaller handling error responses from instagram API
bumped version to 0.1.7
Merge pull request #5 from xiazek/exceptions

Exceptions Handling