Update README.md

fix Travis CI build badge URL

Author: szTheory

README.md

@@ -4,7 +4,7 @@
 
 When using this tool, you only need to pick the `wait-for` file as part of your project.
 
-[![Build Status](https://travis-ci.org/Eficode/wait-for.svg?branch=master)](https://travis-ci.org/Eficode/wait-for)
+[![Build Status](https://travis-ci.org/eficode/wait-for.svg?branch=master)](https://travis-ci.org/Eficode/wait-for)
 
 ## Usage
 
@@ -48,4 +48,4 @@ services:
 Ironically testing is done using [bats](https://github.com/sstephenson/bats), which on the other hand is depending on [bash](https://en.wikipedia.org/wiki/Bash_(Unix_shell)).
 
     docker build -t wait-for .
-    docker run -t wait-for
+    docker run -t wait-for