Add simple heroku setup

[karlbright]

This adds some simple Heroku configuration and setup to allow us to deploy to http://fendersbot.herokuapp.com. Although this may change, this is a simple solution for something we need sooner rather than later.

Counting objects: 9, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (8/8), done.
Writing objects: 100% (9/9), 1.46 KiB | 0 bytes/s, done.
Total 9 (delta 3), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Using set buildpack heroku/nodejs
remote: -----> Node.js app detected
remote:
remote: -----> Creating runtime environment
remote:
remote:        NPM_CONFIG_LOGLEVEL=error
remote:        NPM_CONFIG_PRODUCTION=true
remote:        NODE_ENV=production
remote:        NODE_MODULES_CACHE=true
remote:
remote: -----> Installing binaries
remote:        engines.node (package.json):  unspecified
remote:        engines.npm (package.json):   unspecified (use default)
remote:
remote:        Resolving node version (latest stable) via semver.io...
remote:        Downloading and installing node 5.0.0...
remote:        Using default npm version: 3.3.6
remote:
remote: -----> Restoring cache
remote:        Loading 2 from cacheDirectories (default):
remote:        - node_modules
remote:        - bower_components (not cached - skipping)
remote:
remote: -----> Building dependencies
remote:        Pruning any extraneous modules
remote:        Installing node modules (package.json)
remote:
remote:        > ws@0.4.31 install /tmp/build_6743bca8e3c2a254bfb4c2a248673bb9/node_modules/ws
remote:        > (node-gyp rebuild 2> builderror.log) || (exit 0)
remote:
remote:        make: Entering directory `/tmp/build_6743bca8e3c2a254bfb4c2a248673bb9/node_modules/ws/build'
remote:        CXX(target) Release/obj.target/bufferutil/src/bufferutil.o
remote:        make: Leaving directory `/tmp/build_6743bca8e3c2a254bfb4c2a248673bb9/node_modules/ws/build'
remote:
remote: -----> Caching build
remote:        Clearing previous node cache
remote:        Saving 2 cacheDirectories (default):
remote:        - node_modules
remote:        - bower_components (nothing to cache)
remote:
remote: -----> Build succeeded!
remote:        ├── express@4.13.3
remote:        └── slack-client@1.4.1
remote:
remote:
remote: -----> Discovering process types
remote:        Procfile declares types -> web
remote:
remote: -----> Compressing... done, 11.8MB
remote: -----> Launching... done, v5
remote:        https://fendersbot.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy.... done.
To https://git.heroku.com/fendersbot.git
 + 74decd7...50763f8 heroku -> master (forced update)

[kevincharm]

:+1: