Ease working with latest IntelliJ IDEA

Added the *.iml file to .gitignore.

Split the grunt task "spec" into "preSpec" and "spec," the difference
being that "preSpec" does not run mocha tests due to its afterBuild
event.  This separation makes it easier to create a build configuration
in IntelliJ IDEA from which to debug mocha tests using IDEA's
test runner.

.gitignore

@@ -1,4 +1,5 @@
 .idea/
+*.iml
 node_modules/
 build/
 DRAFT/

Gruntfile.coffee

@@ -20,7 +20,7 @@ module.exports = gruntFunction = (grunt) ->
         template: banner: true
         resources: [ 'inject-version' ]
 
-      spec:
+      preSpec:
         path: 'source/spec'
         dstPath: 'build/spec'
         copy: /./
@@ -35,8 +35,9 @@ module.exports = gruntFunction = (grunt) ->
               equal, notEqual, ok, notOk, tru, fals, deepEqual, notDeepEqual, exact, notExact, iqual,
               notIqual, ixact, notIxact, like, notLike, likeBA, notLikeBA, equalSet, notEqualSet"""
             chai: 'expect' ] ]
-        afterBuild: require('urequire-ab-specrunner').options
-          mochaOptions: "-t 10000 --bail"
+
+      spec: derive: 'preSpec', afterBuild: require('urequire-ab-specrunner').options
+        mochaOptions: "-t 10000 --bail"
 
       specWatch: derive: 'spec', watch: after: 'copy'