add webjars and Twitter Bootstrap dependencies
update main.scala.html
update index.scala.html
update Book controller
add Twitter Bootstrap helper
add Book views
update Book views
update homepage view
update Student controller
add Student views
update Student views
fix bookCreate.scala.html
update Book and Student models
update Request model
update Request controllers
add Request views
add validate method to Book and Student models
update Offer model
update Offer controller
add Offer views