Remove all AMD/Browser/minified bits

If users want to build things, they should use Webpack, or Browserify,
or one of the many other options.  There's no way to please everyone, so
it seems the best approach is to just be like all the other modules that
do not do this stuff.

Separation of concerns.

Fix #120

package.json

@@ -3,18 +3,15 @@
   "version": "4.3.6",
   "description": "The semantic version parser used by npm.",
   "main": "semver.js",
-  "browser": "semver.browser.js",
-  "min": "semver.min.js",
   "scripts": {
-    "test": "tap test/*.js",
-    "prepublish": "make"
+    "test": "tap test/*.js"
   },
   "devDependencies": {
     "tap": "^1.2.0",
     "uglify-js": "~2.3.6"
   },
   "license": "ISC",
-  "repository": "git://github.com/npm/node-semver.git",
+  "repository": "https://github.com/npm/node-semver",
   "bin": {
     "semver": "./bin/semver"
   }

semver.js

@@ -1,6 +1,4 @@
-// export the class if we are in a Node-like system.
-if (typeof module === 'object' && module.exports === exports)
-  exports = module.exports = SemVer;
+exports = module.exports = SemVer;
 
 // The debug function is excluded entirely from the minified version.
 /* nomin */ var debug;
@@ -1199,7 +1197,3 @@ function outside(version, range, hilo, loose) {
   }
   return true;
 }
-
-// Use the define() function if we're in AMD land
-if (typeof define === 'function' && define.amd)
-  define(exports);