Merge pull request #29 from sbhandari/master

Non captain shouldn't edit/delete team
change 'who can play when' page to show previous and upcoming availability
rename some files
remove disabled attribute for now, it doesn't work with links anyways'
Merge pull request #31 from davekaro/pr/30

Pr/30 updates
link_to_if returns the text if condition is not meant. Usually we just want to hide the text too. So just use regular if statements