Merge pull request #218 from gavinballard/readme_issue217

Closes #217 - Update README with info on ENOENT issue.

README.md

@@ -90,6 +90,12 @@ To compile the SCSS files automaticly when they are saved run:
 
     grunt watch
 
+### Common issues
+
+#### Spawn issue on 64-bit Linux systems
+
+If you're running the task on 64-bit Linux systems, you may get a `ENOENT spawn` error when the theme settings tasks is running.
+See [here](https://github.com/discolabs/grunt-shopify-theme-settings/issues/17) for more details and an easy fix.
 
 ## Bugs, issues or feature requests
 
@@ -146,4 +152,4 @@ Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
-limitations under the License.
+limitations under the License.