Towards 1.0

[wlaurance]

1. Drop requirement on request. There are too many extra modules. Use 'http' only
2. General refactoring. Drop the singleton mindset. app.use(appygram({apiKey:'123'})
3. Add easy support for process.on('uncaughtExecption', ->). Encourage users to still call process.exit and get out as they are in state of unknown.