allow empty token strings
test two-legged identification for empty token string
allow the token to be empty in oauth params for signing
change back to previous pom
add separate test for when the oauth token is null for 2-legged requests
Merge pull request #23 from twitter/tshprecher/allow_empty_token_two_legged

allow empty token two legged
bump joauth to 5.0.2-SNAPSHOT
Merge pull request #24 from twitter/publish_5.0.1

bump joauth to 5.0.2-SNAPSHOT
Merge branch 'master' into tojava3

Conflicts:
	pom.xml
	src/main/scala/com/twitter/joauth/OAuthParams.scala
	src/test/scala/com/twitter/joauth/OAuth1ParamsSpec.scala
	src/test/scala/com/twitter/joauth/UnpackerSpec.scala
	src/test/scala/com/twitter/joauth/testhelpers/ParamHelper.scala