Add gerrit detection

This can be tested [here](http://gerrit.rockbox.org)

src/apps.json

@@ -2663,6 +2663,23 @@
 			"icon": "Gentoo.png",
 			"website": "www.gentoo.org"
 		},
+		"Gerrit": {
+			"cats": [
+				47
+			],
+			"meta": {
+				"title": "^Gerrit Code Review$"
+			},
+			"env": "^gerrit_",
+			"script": "^gerrit_ui/gerrit_ui",
+			"html": "<(?:div|style) id=\"gerrit_",
+			"implies": [
+				"Java",
+				"git"
+			],
+			"icon": "gerrit.svg",
+			"website": "www.gerritcodereview.com"
+		},
 		"Get Satisfaction": {
 			"cats": [
 				13

src/icons/gerrit.svg

@@ -0,0 +1,8 @@
+<svg width="52" height="52" xmlns="http://www.w3.org/2000/svg">
+<rect ry="4" rx="4" height="40" width="40" y="0" x="0" fill="#ffaaaa"/>
+<rect ry="4" rx="4" height="40" width="40" y="12" x="12" fill="#aaffaa"/>
+<path d="m18,22l12,0l0,4l-12,0l0,-4z" fill="#ff0000"/>
+<path d="m34,22l12,0l0,4l-12,0l0,-4z" fill="#ff0000"/>
+<path d="m18,36l4,0l0,-4l4,0l0,4l4,0l0,4l-4,0l0,4l-4,0l0,-4l-4,0l0,-4z" fill="#008000"/>
+<path d="m34,36l4,0l0,-4l4,0l0,4l4,0l0,4l-4,0l0,4l-4,0l0,-4l-4,0l0,-4z" fill="#008000"/>
+</svg>