setup cancan for authorization
mission page layout change
normal user can accept missions
code improve based on zlx's advise
I think I sould pay this guy for the review
should set start time when use accept a mission
Merge branch 'master' of github.com:bay6/preunion into feature/mission

Conflicts:
	.gitignore
	Gemfile.lock
Merge pull request #23 from williamherry/feature/mission

setup cancan, change mission layout, can accept mission