wip Linkedin provider
ignore plugin sha1 files
Merge branch 'master' into linkedin
add docs
tests for Google provider
more docs
Google service exception handling test
add taglib
Merge branch 'master' of https://github.com/enr/grails-spring-security-oauth into remove-springsocial
Merge branch 'linkedin' of https://github.com/enr/grails-spring-security-oauth into remove-springsocial
add test
more taglib tests
Merge branch 'master' into remove-springsocial
add tests for FB and Twitter