changing key to id

This makes this provider match the majority of the other provider plugins naming
Adding bearer header

adding Bearer authentication header which fixes fatal error
adding the Bearer only to API requests

the header should not always include the bearer
Merge pull request #226 from ChrisFrench/master

Fixing fatal error in Yammer Provider
Changelog update for #226
Github email issue fixed. #227
Merge pull request #229 from vbezruchkin/master

Github email issue fixed. #227
Change log add for #227 and #229
Fixed Github provider so it works with no scope,
failing gracefully at the request for user email.
Merge pull request #233 from rdiaztushman/master

Fixed Github provider so it works with no scope, failing gracefully at the request for user email.
Fix an issue when you don't have friends in G+ and try using getUsersContacts()
Merge pull request #235 from legrandviv/master

Error fix for when you don't have friends in G+ and try using getUsersContacts()
Changelog entry for #234 and #235
OAuth1Client: Allow to set a request body

The parameters will be appended to the URL instead. Note that the body is unsigned (i.e. no OAuth request body hash is included)!
OAuth1Client: Allow to set a content type
change log entry for #235

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Update CHANGELOG
Merge pull request #237 from cschramm/oauthcontenttype

OAuth1Client: Allow to set a content type
Updated Disqus provider (now works fine)
CHANGELOG updates