remove timeout middleware and add context timeout (#370)

Author: aldas

website/docs/middleware/context-timeout.md

@@ -0,0 +1,29 @@
+---
+description: Context Timeout middleware
+---
+
+# Context Timeout
+
+Timeout middleware is used to timeout request context within a predefined period so context aware methods could return
+early.
+
+## Usage
+
+```go
+e.Use(middleware.ContextTimeout(60 * time.Second))
+```
+
+## Custom Configuration
+
+```go
+e.Use(middleware.ContextTimeoutWithConfig(middleware.ContextTimeoutConfig{
+    // Skipper defines a function to skip middleware.
+    Skipper:      nil,
+    // ErrorHandler is a function when error aries in middleware execution.
+    ErrorHandler: nil,
+    // Timeout configures a timeout for the middleware, defaults to 0 for no timeout
+    Timeout:      60 * time.Second,
+}))
+```
+
+