feat: remove karma binary in favor of karma-cli

BREAKING CHANGE:
The `karma` module does not export `karma` binary anymore. The recommended way is to have local modules (karma and all the plugins that your project needs) stored in your `package.json`. You can run that particular Karma by `./node_modules/karma/bin/karma`. Or you can have `karma-cli` installed globally on your system, which enables you to use the `karma` command.

The global `karma` command (installed by `karma-cli`) does look for local version of Karma (including parent directories) first and fall backs to a global one.

The `bin/karma` binary does not look for any other instances of Karma and just runs the one that it belongs to.

bin/karma

@@ -1,30 +1,3 @@
 #!/usr/bin/env node
 
-var path = require('path');
-var fs = require('fs');
-
-// Try to find a local install
-var dir = path.resolve(process.cwd(), 'node_modules', 'karma', 'lib');
-
-// Check if the local install exists else we use the install we are in
-if (!fs.existsSync(dir)) {
-  dir = path.join('..', 'lib');
-}
-
-var cli = require(path.join(dir, 'cli'));
-var config = cli.process();
-
-switch (config.cmd) {
-  case 'start':
-    require(path.join(dir, 'server')).start(config);
-    break;
-  case 'run':
-    require(path.join(dir, 'runner')).run(config);
-    break;
-  case 'init':
-    require(path.join(dir, 'init')).init(config);
-    break;
-  case 'completion':
-    require(path.join(dir, 'completion')).completion(config);
-    break;
-}
+require('../lib/cli').run();

lib/cli.js

@@ -215,6 +215,27 @@ exports.process = function() {
   return processArgs(argv, options, fs, path);
 };
 
+
+exports.run = function() {
+  var config = exports.process();
+
+  switch (config.cmd) {
+    case 'start':
+      require('./server').start(config);
+      break;
+    case 'run':
+      require('./runner').run(config);
+      break;
+    case 'init':
+      require('./init').init(config);
+      break;
+    case 'completion':
+      require('./completion').completion(config);
+      break;
+  }
+};
+
+
 // just for testing
 exports.processArgs = processArgs;
 exports.parseClientArgs = parseClientArgs;

package.json

@@ -164,9 +164,7 @@
     "grunt-browserify": "~1.2.4"
   },
   "main": "./lib/index",
-  "bin": {
-    "karma": "./bin/karma"
-  },
+  "bin": {},
   "engines": {
     "node": "~0.8 || ~0.10"
   },