Add Makefile for multishell testing

updated nvm current test for zsh

.travis.yml

@@ -2,4 +2,4 @@ language: bash
 before_script:
   - curl -o /tmp/urchin https://raw.github.com/scraperwiki/urchin/master/urchin && chmod +x /tmp/urchin
 script:
-  - NVM_DIR=$TRAVIS_BUILD_DIR /tmp/urchin test
+  - NVM_DIR=$TRAVIS_BUILD_DIR make URCHIN=/tmp/urchin test

Makefile

@@ -0,0 +1,15 @@
+URCHIN=`which urchin`
+SHELLS=sh bash dash ksh zsh
+
+.PHONY: $(SHELLS) test
+
+fast: $(SHELLS)
+
+$(SHELLS):
+	@printf '\n\033[0;34m%s\033[0m\n' "Running tests in $@"
+	@$@ $(URCHIN) -f test/fast
+
+test: fast
+	@$(URCHIN) -f test/slow 
+
+default: test

test/fast/Running "nvm current" should display current nvm environment.

@@ -3,4 +3,4 @@
 die () { echo $@ ; exit 1; }
 
 . ../../nvm.sh
-[ "$(nvm current)" = `node -v` ] || die "Failed to find current version"
+[ "$(nvm current)" = "$(node -v)" ] || die "Failed to find current version"