Move node-specific installation tests to their own directory.

test/installation/node/install two versions and use the latest one

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+die () { echo $@ ; exit 1; }
+
+. ../../../nvm.sh
+
+# Remove the stuff we're clobbering.
+[ -e ../../../v0.9.7 ] && rm -R ../../../v0.9.7
+[ -e ../../../v0.9.12 ] && rm -R ../../../v0.9.12
+
+# Install from binary
+nvm install 0.9.7 || die "'nvm install 0.9.7' failed"
+nvm i 0.9.12 || die "'nvm i 0.9.12' failed"
+
+# Check
+[ -d ../../../v0.9.7 ] || die "v0.9.7 didn't exist"
+[ -d ../../../v0.9.12 ] || die "v0.9.12 didn't exist"
+
+# Use the first one
+nvm use 0.9.7 || die "'nvm use 0.9.7' failed"
+
+# Use the latest one
+nvm use 0.9 || die "'nvm use 0.9' failed"
+node --version | grep v0.9.12 || die "'node --version' was not v0.9.12, got: $(node --version)"
+