Added multiple options to webemulator.

Now the webemulator is able to handle the following options:
* ram = amount of memory in steps of 8K (8-2048)
* cpu = c816 or c02
* mhz = speed in MHz, minimum 1
* keymap = same list of keymaps supported as normal emualtor
* longpwron = Boot emulator into RAM diagnostics
* widescreen = enable widescreen if true
* capture = capture keyboard and mouse if true
All of the above options are available on the address/url or in the manifest file.
On the address line longpwron, widescreen & capture do not need values to be enabled.
In the manifest file, they must be set to true.
Options in manifest file take precedens over options on address line.

webassembly/main.js

@@ -73,19 +73,36 @@ var manifest_link = url.searchParams.get("manifest");
 var ram_val = url.searchParams.get("ram");
 var cpu_val = url.searchParams.get("cpu");
 var mhz_val = url.searchParams.get("mhz");
+var lang_val = url.searchParams.get("keymap");
+var diag = url.searchParams.get("longpwron");
+var wide = url.searchParams.get("widescreen");
+var capture = url.searchParams.get("capture");
 
 var emuArguments = ['-keymap', lang, '-rtc'];
 
 if (ram_val) {
     emuArguments.push('-ram', ram_val);
 }
 if (cpu_val) {
-    if (cpu_val == 'c816')
+    if (cpu_val == 'c816') {
         emuArguments.push('-c816');
+    }
 }
 if (mhz_val) {
     emuArguments.push('-mhz', mhz_val);
 }
+if (lang_val) {
+    emuArguments.push('-keymap', lang_val);
+}
+if (diag != null) {
+    emuArguments.push('-longpwron');
+}
+if (wide != null) {
+    emuArguments.push('-widescreen');
+}
+if (capture != null) {
+    emuArguments.push('-capture');
+}
 
 if (manifest_link) {
     openFs();
@@ -310,6 +327,36 @@ function extractManifestFromBuffer(zip) {
                 console.log("Parsed manifest from zip:")
                 console.log(manifestObject);
 
+		if (manifestObject.ram) {
+			console.log('Found RAM amount: '+manifestObject.ram);
+			emuArguments.push('-ram', manifestObject.ram);
+		}
+		if (manifestObject.cpu) {
+			console.log('Found CPU type: '+manifestObject.cpu);
+			if (manifestObject.cpu == 'c816')
+				emuArguments.push('-c816');
+		}
+		if (manifestObject.mhz) {
+			console.log('Found mhz variable: '+manifestObject.mhz);
+			emuArguments.push('-mhz', manifestObject.mhz);
+		}
+		if (manifestObject.keymap) {
+			console.log('Found keymap variable: '+manifestObject.keymap);
+			emuArguments.push('-keymap', manifestObject.keymap);
+		}
+		if (manifestObject.longpwron) {
+			console.log('Found longpwron variable');
+			emuArguments.push('-longpwron');
+		}
+		if (manifestObject.widescreen) {
+			console.log('Found widescreen variable');
+			emuArguments.push('-widescreen');
+		}
+		if (manifestObject.capture) {
+			console.log('Found capture variable');
+			emuArguments.push('-capture');
+		}
+
                 const promises = [];
                 if (manifestObject.resources) {
                     console.log('Found resources section in manifest.');