Adding a makefile
Removing sudo
Minor fixes based on discussions on #2693

* Volume exports ./bundles instead of root directory
* Documents build using docker-docs instead of docker:docs
* Bundles directory is created before running build or docs
Update to Go 1.2 officially, now that it is released
Merge pull request #2978 from tianon/go1.2

Update to Go 1.2 officially, now that it is released
Merge pull request #2693 from fkautz/makefile

Adding a makefile