Include code-quality checks

[lopezator]

Including code-quality checks should be a must for every go project.

We tend to use in our projects the following ones: goimports, golint, vet, megacheck, errcheck.

They han proven to be very useful.

Possibly add more?

I was thinking of adding a Makefile, refactor the code to pass all the checks, and possibly integrate that Makefile check as a Travis CI building stage?

I would take over this.

Thoughts?

[F21]

Hey @lopezator, thanks for offering to work on this. I think this is an excellent idea and certainly look forward to your contribution.

Do we need to use a makefile? Would running the checks using a shell script suffice?

[lopezator]

Sure.

However IMHO Makefiles gives you better flexibility as you can organize better the different checks and run individual targets easily.

[F21]

That makes sense. Let's go with makefiles then.

[F21]

Merged in #49