fix issue #142, POST,PUT and PATCH should use form encoded date not the other way around
bump version
bump version in Readme example
Merge branch 'release/1.2.8'
Merge branch 'release/1.2.8' into develop
Fix spelling in README
Merge pull request #143 from rmtheis/develop

Fix spelling in README
replaced id by instancetype and adjusted indentation
changed the assertionflow according to RFC 6749 draft 17
Fixed warning.
Merge branch 'master' of https://github.com/nxtbgthng/OAuth2Client into develop

# Via Thomas Kollbach
* 'master' of https://github.com/nxtbgthng/OAuth2Client:
Merge branch 'feature/AssertionFlow' of https://github.com/nxtbgthng/OAuth2Client into develop

# By Carola Nitz
# Via Carola Nitz
* 'feature/AssertionFlow' of https://github.com/nxtbgthng/OAuth2Client:
  changed the assertionflow according to RFC 6749 draft 17
  replaced id by instancetype and adjusted indentation
Merge branch 'develop' of https://github.com/gerasim13/OAuth2Client into develop

* 'develop' of https://github.com/gerasim13/OAuth2Client:
  Recommended project settings.

Conflicts:
	Sources/OAuth2Client/NXOAuth2PostBodyStream.m