Update info.json with NDVI description (#199)

* Update info.json

* compiled

src/modules/NdviRed/info.json

@@ -1,5 +1,6 @@
 {
-  "name": "NDVI Red",
+  "name": "NDVI for red filters",
+  "description": "Normalized Difference Vegetation Index, or NDVI, is an image analysis technique used with aerial photography. It's a way to visualize the amounts of infrared and other wavelengths of light reflected from vegetation. Because both these methods compare ratios of blue and red light absorbed versus green and IR light reflected, they can be used to evaluate the health of vegetation. It's a snapshot of how much photosynthesis is happening. This is helpful in assessing vegetative health or stress. <a href='https://publiclab.org/ndvi'>Read more</a>.<br /><br/>This is designed for use with red-filtered single camera <a href='http://publiclab.org/infragram'>DIY Infragram cameras</a>.",
   "inputs": {
   }
 }