version attribute is ignored for plugins

[hbugdoll]

@cb1kenobi This is for the transition from node-appc to node-titanium-sdk!

---

lib/timodule.js correctly takes into account the version attribute of a <module> tag.

So, <module platform="iphone" version="99.99.99">ti.map</module> in tiapp.xml gives

[DEBUG] Looking for Titanium module id=ti.map version=99.99.99 platform=ios deploy-type=development
[WARN]  Could not find a valid Titanium module id=ti.map version=99.99.99 platform=ios deploy-type=development
...
[ERROR] Could not find all required Titanium Modules:
[ERROR]    id: ti.map    version: 99.99.99       platform: ios   deploy-type: development

---

But lib/tiplugin.js just passes the version attribute:

node-appc/lib/tiplugin.js

Lines 132 to 151 in c35e794

	logger && logger.debug(__('Looking for Titanium plugin id=%s version=%s', plugin.id.cyan, originalVersion.cyan));
	let found;
	for (let i = 0; !found && i < scopes.length; i++) {
	const scope = installed[scopes[i]];
	if (scope && scope[plugin.id]) {
	const info = scope[plugin.id][plugin.version] || scope[plugin.id]['unknown'] || scope[plugin.id]['-'];
	if (info) {
	util.mix(plugin, info);
	logger && logger.info(__('Found Titanium plugin id=%s version=%s ', plugin.id.cyan, originalVersion.cyan));
	result.found.push(plugin);
	found = true;
	}
	}
	}
	if (!found) {
	logger && logger.warn(__('Could not find Titanium plugin id=%s version=%s', plugin.id.cyan, originalVersion.cyan));
	result.missing.push(plugin);
	}

So, <plugin version="99.99.99">ti.alloy</plugin> results in following false positive log:

[DEBUG] Detecting plugins in /Users/***/kitchensink-v2/plugins
[DEBUG] Detected plugin: ti.alloy @ /Users/***/kitchensink-v2/plugins/ti.alloy
[DEBUG] Looking for Titanium plugin id=ti.alloy version=99.99.99
[INFO]  Found Titanium plugin id=ti.alloy version=99.99.99

The "wrong" plugin version is loaded.