Remove build.rs and skeptic from build deps

This means the readme file is no longer checked for code errors, however the build tree is vastly simplified

Author: ryankurte

Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 
 name = "i2cdev"
-build = "build.rs"
 version = "0.4.0"
 authors = ["Paul Osborne <[email protected]>"]
 license = "MIT/Apache-2.0"
@@ -24,5 +23,3 @@ nix = "0.11"
 docopt = "0.8"
 skeptic = "0.13"
 
-[build-dependencies]
-skeptic = "0.13"