Add support for Beam, Underline cursors

Notable about this implementation is it takes a different approach for
managing cursor cells that previously. The terminal Grid is now
borrowed *immutably*. Instead of mutating Cells in the Grid, a list is
managed within the RenderableCellsIter. The cell at the cursor location
is skipped over, and instead cells are popped off a list of cursor
cells.

It would be good in the future to share some more code between the
different cursor style implementations for populating the cursor cells
list.

Supercedes #349.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 0a3366ce..2ee23d7b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,6 +20,7 @@
 #![cfg_attr(feature = "clippy", deny(if_not_else))]
 #![cfg_attr(feature = "clippy", deny(wrong_pub_self_convention))]
 #![cfg_attr(feature = "nightly", feature(core_intrinsics))]
+#![cfg_attr(all(test, feature = "bench"), feature(test))]
 
 #[macro_use] extern crate bitflags;
 #[macro_use] extern crate clap;
@@ -30,6 +31,7 @@
 #[cfg(any(target_os = "linux", target_os = "freebsd", target_os="dragonfly", target_os="openbsd"))]
 extern crate x11_dl;
 
+extern crate arraydeque;
 extern crate cgmath;
 extern crate copypasta;
 extern crate errno;