Fbs

See 67.

* Slightly improved the output you see from several fbs commands.
* `fbs freeze` now gives a more helpful hint when `msvcr110.dll` can't be found on Windows. See 63.

It bumps the version and runs `clean`, `freeze`, ..., `upload`.

The new command uploads your binaries to https://fbs.sh, so your users can download and install very easily. This is especially powerful on Linux, where automatic updates and code signing are already implemented. Say you are on Linux. Then the following sequence of commands creates, compiles and uploads an app:

fbs startproject
fbs gengpgkey
fbs register
fbs buildvm ubuntu
fbs runvm ubuntu
(In the Ubuntu virtual machine):
fbs clean
fbs freeze
fbs installer
fbs repo
fbs upload

The output of the `upload` command gives you download instructions that you can give to your users. What's more, when they install your app using the instructions and you release a new version via the above commands, then they automatically receive your changes :muscle:

This release also improves the usability of a few other commands.

* There are now `register` and `login` commands. This is in preparation of an `upload` command which will let you upload your installer to the domain https://fbs.sh.
* Sensitive settings are now stored in `src/build/settings/secret.json`. This lets you exclude this file from VCS, and thus eg. prevent it from being uploaded to GitHub.
* Many commands now give more helpful hints when you use them incorrectly.