Auto merge of #10 - ebfull:remove-travis, r=ebfull

Remove travis CI.

.travis.yml

@@ -1,7 +0,0 @@
-sudo: false
-language: rust
-rust:
-  - nightly
-
-script:
-  - cargo test --release

README.md

@@ -1,4 +1,4 @@
-# bellman [![Build status](https://api.travis-ci.org/ebfull/bellman.svg)](https://travis-ci.org/ebfull/bellman) [![Crates.io](https://img.shields.io/crates/v/bellman.svg)](https://crates.io/crates/bellman) #
+# bellman [![Crates.io](https://img.shields.io/crates/v/bellman.svg)](https://crates.io/crates/bellman) #
 
 This is a research project being built for [Zcash](https://z.cash/).