FTBS on Ubuntu 16.04 and higher

[Trophime]

Hi, I would like to use termpix on Ubuntu.
Trying to install it give the following error:

error: expected ident, found #
   --> root/.cargo/registry/src/github.com-1ecc6299db9ec823/bitflags-1.0.1/src/lib.rs:423:29
    |
423 |                               #[allow(deprecated)]
    |                               ^
    | 
   ::: root/.cargo/registry/src/github.com-1ecc6299db9ec823/bitflags-1.0.1/src/example_generated.rs
    |
4   | / bitflags! {
5   | |     /// This is the same `Flags` struct defined in the [crate level example](../index.html#example).
6   | |     /// Note that this struct is just for documentation purposes only, it must not be used outside
7   | |     /// this crate.
...   |
13  | |     }
14  | | }
    | |_- in this macro invocation

error: Could not compile `bitflags`.
Build failed, waiting for other jobs to finish...
error: failed to compile `termpix v0.1.0 (https://github.com/hopey-dishwasher/termpix#bb2fcc5e)`, intermediate artifacts can be found at `/tmp/cargo-install.sp8ocd7rH3bQ`

Caused by:
  build failed