Added keywords to composer.json

composer.json

@@ -2,6 +2,22 @@
   "name": "phayes/geophp",
   "license": "GPL-2 or New-BSD",
   "type": "library",
+  "keywords": [
+    "Geo",
+    "GIS",
+    "Geography",
+    "Geometry",
+    "GEOS",
+    "GPX",
+    "WKT",
+    "EWKT",
+    "WKB",
+    "EWKB",
+    "KML",
+    "GeoJson",
+    "GeoRSS",
+    "GeoHash"
+  ],
   "description": "GeoPHP is a open-source native PHP library for doing geometry operations. It is written entirely in PHP and can therefore run on shared hosts. It can read and write a wide variety of formats: WKT (including EWKT), WKB (including EWKB), GeoJSON, KML, GPX, GeoRSS). It works with all Simple-Feature geometries (Point, LineString, Polygon, GeometryCollection etc.) and can be used to get centroids, bounding-boxes, area, and a wide variety of other useful information.",
   "homepage": "https://github.com/phayes/geoPHP",
   "autoload": {