version 2.1.5 is not released yet
fix spec command
for avoiding conflict of twice gem againt other plugins

Travis.ci has a valiable 'RAILS_ENV'
I should see ENV hash
Fixed first week not processed correctly such as 2013 years 0 week.
Merge pull request #7 from alminium/redmine-2.1.x

Fixed first week not processed correctly such as 2013 years 0 week.
need spork, development gem, in the test
Updated testing for Redmine 2.3.0