changelog. - papyrus

Added the .cancel and .c commands which allow users to cancel out of the current input. This lets you exit more input loops if a leading closing bracket was defined.

Turned off colouring for Windows, not yet working as intended.

Added a version query to crates.io. When the repl is run interactively it will check the version number and print if there is a later version available.
Added query() method to query papyrus version on crates.io.

Added in benchmarks.

Updated .travis.yml to initiate code coverage.

First pass refactoring towards library stablisation.
Added ExternCrate support. You can now use extern crate crate_name as alias;. This will work in most cases, please raise a PR if it doesn't.
Compilation status is redirected to the console.
Panics now get shown, and statements won't be added if code panics.