add dependency injection support to Bogart
modify flash middleware for dependency injection
modify session middleware for dependency injection
invoke with Injector#invoke even if only the implicit router is used in a bogart#App
register next and nextApp of undefined for the case of only using the implicit router
modernize the pipe-file example
change the static-server example to use implicit router on bogart#App
Fix bug where content-type doesn't exists ($.ajax was failing)
Merge pull request #84 from soitgoes/master

Fix bug where content-type doesn't exists ($.ajax was failing)
bump to v0.5.15
merge with master, bump to v0.7.0 in package.json