Replaces gorilla mux to goji and decied to remove vendor dependencies from git (#28)

* Replaces gorilla mux to goji

Removed the applicationContext stuff. Now every handler is a struct, and each one hold its dependencies.

* handler not handle

* Ignoring vendor dir

* Hide handlers complexity instantiation.

* Websocket handler does not need common handlers

* Use maps instead of for loops to search in memdb for apps (#29)

* Use maps instead of for loops to search in memdb for apps; use mutexes more efficiently by immediately unlocking when lock is no longer needed, not just at the end of the function via defer

* Fixed assignment to entry in nil map

* Minor impovements in source code

* Replaces gorilla mux to goji

Removed the applicationContext stuff. Now every handler is a struct, and each one hold its dependencies.

* handler not handle

* Ignoring vendor dir

* Hide handlers complexity instantiation.

* Websocket handler does not need common handlers

* renamed IdMutex to IDMutex to follow go convention

glide.yaml

@@ -1,6 +1,11 @@
 package: github.com/dimiro1/ipe
 import:
 - package: github.com/golang/glog
-- package: github.com/gorilla/mux
 - package: github.com/gorilla/websocket
 - package: github.com/pusher/pusher-http-go
+- package: goji.io
+  subpackages:
+  - pat
+- package: golang.org/x/net
+  subpackages:
+  - context