Add :language-in and :language-out

Since https://github.com/clojure/clojurescript/commit/b33bde39fe838d367939b55b9dadb0480ea00a7c Clojurescript allows language-in and language-out to be specified.
Add :preamble

Since https://github.com/clojure/clojurescript/commit/136bf46c656265a93dd15c40925f11edb34bd127 the Clojurescript compiler supports :preamble
Merge pull request #311 from paulbutcher/patch-2

Add :preamble to sample.project.clj
Update plugin dependency to 1.0.3
Merge pull request #314 from wtfleming/patch-1

Update plugin dependency shown in sample.project.clj to 1.0.3
Merge branch 'master' into patch-1

Conflicts:
	sample.project.clj
Merge pull request #310 from paulbutcher/patch-1

Add :language-in and :language-out to sample.project.clj
Missing Parenthesis
Merge pull request #316 from jestinepaul/patch-1

Missing brace in sample.project.clj
Add :closure-warnings
add ansicon recommendation in README for color output in Windows
Fix links to moved ring repo
Update comment about :optimization in sample.project.clj
Add minimal example project for optimization :none

This is basically just "lein new mies none" plus a few comments in
project.clj.
Merge pull request #343 from gaverhae/master

Advertize :optimization :none in doc
Merge pull request #340 from tillarnold/master

Fix links to moved ring repo
Merge pull request #324 from paulbutcher/patch-3

Add :closure-warnings
Merge pull request #333 from shaunlebron/master

Help Windows users get readable, colorized compiler output
Merge branch 'master' of github.com:emezeske/lein-cljsbuild into develop/1.0.0
bump deps in sample project.clj's, fixes gh-334