[JRO] Update gemspec
[JRO] Update gemspec

1. Add Gleb to authors & emails
2. Bump rails dependency to 4.1.0+

jvoss/thredded,jayroh/thredded,thredded/thredded,thredded/thredded,thredded/thredded,jvoss/thredded,jvoss/thredded,jayroh/thredded,thredded/thredded,jvoss/thredded,jayroh/thredded,jayroh/thredded