PLT-4357 adding performance monitoring (#4622)

* WIP

* WIP

* Adding metrics collection

* updating vendor packages

* Adding metrics to config

* Adding admin console page for perf monitoring

* Updating glide

* switching to tylerb/graceful

vendor/github.com/prometheus/client_model/setup.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python
+
+from setuptools import setup
+
+setup(
+    name = 'prometheus_client_model',
+    version = '0.0.1',
+    author = 'Matt T. Proud',
+    author_email = 'matt.proud@gmail.com',
+    description = 'Data model artifacts for the Prometheus client.',
+    license = 'Apache License 2.0',
+    url = 'http://github.com/prometheus/client_model',
+    packages = ['prometheus', 'prometheus/client', 'prometheus/client/model'],
+    package_dir = {'': 'python'},
+    requires = ['protobuf(==2.4.1)'],
+    platforms = 'Platform Independent',
+    classifiers = ['Development Status :: 3 - Alpha',
+                   'Intended Audience :: Developers',
+                   'Intended Audience :: System Administrators',
+                   'License :: OSI Approved :: Apache Software License',
+                   'Operating System :: OS Independent',
+                   'Topic :: Software Development :: Testing',
+                   'Topic :: System :: Monitoring'])