Add some more Cargo metadata

Author: jamwaffles

Cargo.toml

@@ -5,6 +5,13 @@ version = "0.1.0"
 authors = ["James Waples <[email protected]>"]
 keywords = ["no-std", "rtfm", "ssd1306", "oled", "embedded", "embedded-hal-driver"]
 repository = "https://github.com/jamwaffles/ssd1306"
+documentation = "https://jamwaffles.github.io/ssd1306"
+readme = "README.md"
+license = "MIT OR Apache-2.0"
+exclude = [
+	".travis.yml",
+	".gitignore"
+]
 
 [dependencies]
 embedded-hal = "0.1.2"