Build fails on progressbar

[davidmgre]

Hi @dvassallo,

Great utility!

I'm attempting to run dep ensure but the process fails. Any guidance is appreciated!

...
	v0.2.0: Could not introduce github.com/schollz/progressbar@v0.2.0, as its subpackage github.com/schollz/progressbar/v2 is missing. (Package is required by (root).)
	v0.1.0: Could not introduce github.com/schollz/progressbar@v0.1.0, as its subpackage github.com/schollz/progressbar/v2 is missing. (Package is required by (root).)
	master: Could not introduce github.com/schollz/progressbar@master, as its subpackage github.com/schollz/progressbar/v2 is missing. (Package is required by (root).)
	finish: Could not introduce github.com/schollz/progressbar@finish, as its subpackage github.com/schollz/progressbar/v2 is missing. (Package is required by (root).)
	time: Could not introduce github.com/schollz/progressbar@time, as its subpackage github.com/schollz/progressbar/v2 is missing. (Package is required by (root).)