Update .travis.yml and README (doesn't compile on Go 1.1)

.travis.yml

@@ -1,6 +1,5 @@
 language: go
 go:
- - 1.1
  - 1.2
  - 1.3
  - tip

README.md

@@ -58,6 +58,8 @@ You can configure Go-MailHog using command line options or environment variables
 
 Clone this repository to ```$GOPATH/src/github.com/ian-kent/Go-MailHog``` and type ```make deps```.
 
+Requires Go 1.2+ to build.
+
 Run tests using ```make test``` or ```goconvey```.
 
 If you make any changes, run ```go fmt ./...``` before submitting a pull request.