remove most of CSS from JavaScript

The uploadElement is probably going to have to stay, unfortunately, but
the rest is gone.

static/css/dropzone.css

@@ -1,5 +1,4 @@
-#dropzone {
-    width: 400px;
+#dropzone { width: 400px;
     margin-left: auto;
     margin-right: auto;
 }
@@ -46,6 +45,11 @@ div.upload {
     color: #556A7F;
 }
 
+.upload .deleted,
+.upload .error {
+    color: #E68181;
+}
+
 .upload .right {
 	float: right;
 	padding-left: 5px;
@@ -55,4 +59,10 @@ div.upload {
 	margin-right: 5px;
 	font-size: 10px;
     border-bottom: 1px dotted #556A7F;	
-}
+    color: #E68181;
+    cursor: pointer;
+}
+
+.dz-drag-hover div.dz-default {
+    background-color: #2c89f0;
+}

static/js/upload.js

@@ -1,24 +1,5 @@
 Dropzone.options.dropzone = {
 	init: function() {
-		this.dzone = document.getElementById("dzone");
-		this.on("drop", function(ev) {
-			this.dzone.style.backgroundColor = "#FAFBFC";
-		});
-		this.on("dragstart", function(ev) {
-			this.dzone.style.backgroundColor = "#2c89f0";
-		});
-		this.on("dragend", function(ev) {
-			this.dzone.style.backgroundColor = "#FAFBFC";
-		});
-		this.on("dragenter", function(ev) {
-			this.dzone.style.backgroundColor = "#2c89f0";
-		});
-		this.on("dragover", function(ev) {
-			this.dzone.style.backgroundColor = "#2c89f0";
-		});
-		this.on("dragleave", function(ev) {
-			this.dzone.style.backgroundColor = "#FAFBFC";
-		});
 	},
 	addedfile: function(file) {
 		var upload = document.createElement("div");
@@ -62,7 +43,6 @@ Dropzone.options.dropzone = {
 		file.leftElement.innerHTML = '<a target="_blank" href="' + resp.url + '">' + resp.url + '</a>';
 		file.rightRightElement.innerHTML = "Delete";
 		file.rightRightElement.className = "cancel";
-		file.rightRightElement.style.color = "#E68181";
 		file.rightRightElement.onclick = function(ev) {
 		    xhr = new XMLHttpRequest();
 			xhr.open("DELETE", resp.url, true);
@@ -70,7 +50,7 @@ Dropzone.options.dropzone = {
 			xhr.onreadystatechange = function(file) {
 				if (xhr.status === 404) {
 					file.leftElement.innerHTML = 'Deleted <a target="_blank" href="' + resp.url + '">' + resp.url + '</a>';
-					file.leftElement.style.color = "#E68181";
+					file.leftElement.className = "deleted";
 					file.rightRightElement.onclick = null;
 					file.rightRightElement.innerHTML = "";					
 				}
@@ -88,7 +68,7 @@ Dropzone.options.dropzone = {
 		else {
 			file.leftElement.innerHTML = "Could not upload " + file.name;
 		}
-		file.leftElement.style.color = "#E68181";
+		file.leftElement.className = "error";
 	},
 
     maxFilesize: 4096,