Stacker crate didn't do anything after all; fixed a couple bugs Will found, implemented shift / enter / backspace

Cargo.lock

@@ -950,15 +950,6 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9145ac0af1d93c638c98c40cf7d25665f427b2a44ad0a99b1dccf3e2f25bb987"
 
-[[package]]
-name = "psm"
-version = "0.1.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "871372391786ccec00d3c5d3d6608905b3d4db263639cfe075d3b60a736d115a"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.18"
@@ -1117,19 +1108,6 @@ dependencies = [
  "num-traits",
 ]
 
-[[package]]
-name = "stacker"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90939d5171a4420b3ff5fbc8954d641e7377335454c259dcb80786f3f21dc9b4"
-dependencies = [
- "cc",
- "cfg-if 1.0.0",
- "libc",
- "psm",
- "winapi",
-]
-
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -1240,7 +1218,6 @@ version = "0.1.0"
 dependencies = [
  "pixels",
  "rand",
- "stacker",
  "vasm",
  "vcore",
  "winit",