add some shell scripts to make some tasks slightly easier

[leob]

Right now, some build/deployment tasks require typing multiple commands, e.g. "gulp build" followed by "ionic run", etc.

Another example is the need to switch around the directory setting in 'ionic.project' from "src" to "www" if you want to test a production build with "ionic serve" or "ionic upload" (Ionic View app).

It would be good to include a 'bin' directory in the project with some simple shell scripts for these tasks.