eg: add appengine skeleton

eg/appengine/.gitignore

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+env

eg/appengine/README.md

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+App Engine skeleton for hylang
+==============================
+
+# Demo
+
+[proppy-hy.appspot.com](https://proppy-hy.appspot.com)
+[proppy-hy.appspot.com/paultag](https://proppy-hy.appspot.com/paultag)
+
+
+# Setup
+```
+pip install -r requirements.txt -t env
+```
+
+# Run locally
+```
+dev_appserver.py .
+```
+
+# Deploy
+```
+appcfg.py -a ${APPID} --oauth2 update .
+```

eg/appengine/app.yaml

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+application: hy-sample
+version: 1
+runtime: python27
+api_version: 1
+threadsafe: yes
+
+handlers:
+- url: /favicon\.ico
+  static_files: favicon.ico
+  upload: favicon\.ico
+
+- url: .*
+  script: main.__hymain__.app

eg/appengine/appengine_config.py

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+import os.path
+import sys
+sys.path.insert(0, os.path.abspath('env'))

eg/appengine/main.hy

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+(require hy.contrib.meth)
+(import [flask [Flask redirect]])
+
+(def app (Flask __name__))
+
+(route hello "/<name>" [name] (.format "(hello \"{0}!\")" name))
+(route root "/" [] (redirect "/hyne"))

eg/appengine/main.py

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+from hy.importer import import_file_to_module
+__hymain__ = import_file_to_module('__hymain__', 'main.hy')

eg/appengine/requirements.txt

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+Flask
+hy==0.9.10 # master is broken because of rply