Refactor + Intefaces

[lxfontes]

• Implemented Encrypt, receiving an io.Reader and outputting to io.Writer
  • refactored EncryptFileInPlace
• Implemented Decrypt, also receiving io.Reader and outputting to io.Writer
  • refactored DecryptFile
• Refactored tests to use temporary directories and files instead of overwriting readFile, fileMode
  • removed mocks
• Migrated godep to glide
• Updated to go 1.7
• Updated dev.yml

Why ?

• We didn't have an encrypt method that didn't overwrite files
• Having those 2 methods dealing with interfaces facilitates key rotation

r @burke

This diff sucks :(

[burke]

I'd have preferred for this to be two different PRs, even if they're not shippable individually (commits 1,2,4, vs. commit 3), but anyway:

1,2,4

Is there a rough consensus on using glide now? I've still been using Godep with the 1.7 vendor structure; if you remove Godeps/_workspace, it will just vendor them in the new way when you godep save ./....

If there are lots of other projects using glide, I'm tentatively okay with this, but otherwise I'd prefer to stick to Godep.

You'll also want to bump the version in dev.yml.

3

Looks good at a first glance; I'll go through and review that commit.

[burke]

Yep the actual changes LGTM

[lxfontes]

🤘 splitting this up into 2