CLI refactor with commander (#6058)

* CLI refactor with commander

- Modularized the functionality
- All functionality done directly from `./nodebb` now
(still available from `app` for backwards compatibility)
- Moved all CLI code from `./nodebb` to `src/cli`
- Fixed `nodebb.bat` to work from any location, like `./nodebb`, and
also hides command output
- Overwrite some commander methods to add CLI color support
- Added `./nodebb info` for quick info including git hash, NodeBB
version, node version, and some database info
- Refactored `./nodebb reset` to allow multiple resets at once
- Changed `./nodebb restart` to essentially stop and start, as Windows
doesn't support signals
- Added `-l, --log` option which works on `./nodebb start` and `./nodebb
restart` to show logging, like `./nodebb slog`
- Expanded `-d, --dev` option which works on them as well, like
`./nodebb dev`
- Improvements to self-help. `./nodebb build -h` will output all
possible targets
- `./nodebb reset` explains usage better

* Fix some style inconsistencies

* Fix prestart being required before modules installed

* Fix travis failures

* Fix `help` command to output help for subcommands

* Pick steps of the upgrade process to run

* Fix formatting for upgrade help

* Fix web installer

src/cli/setup.js

@@ -0,0 +1,59 @@
+'use strict';
+
+var winston = require('winston');
+var async = require('async');
+
+var install = require('../../install/web').install;
+
+function setup() {
+	var install = require('../install');
+	var build = require('../meta/build');
+	var prestart = require('../prestart');
+
+	winston.info('NodeBB Setup Triggered via Command Line');
+
+	process.stdout.write('\nWelcome to NodeBB!\n');
+	process.stdout.write('\nThis looks like a new installation, so you\'ll have to answer a few questions about your environment before we can proceed.\n');
+	process.stdout.write('Press enter to accept the default setting (shown in brackets).\n');
+
+	async.series([
+		install.setup,
+		prestart.loadConfig,
+		build.buildAll,
+	], function (err, data) {
+		// Disregard build step data
+		data = data[0];
+
+		var separator = '     ';
+		if (process.stdout.columns > 10) {
+			for (var x = 0, cols = process.stdout.columns - 10; x < cols; x += 1) {
+				separator += '=';
+			}
+		}
+		process.stdout.write('\n' + separator + '\n\n');
+
+		if (err) {
+			winston.error('There was a problem completing NodeBB setup', err);
+			throw err;
+		} else {
+			if (data.hasOwnProperty('password')) {
+				process.stdout.write('An administrative user was automatically created for you:\n');
+				process.stdout.write('    Username: ' + data.username + '\n');
+				process.stdout.write('    Password: ' + data.password + '\n');
+				process.stdout.write('\n');
+			}
+			process.stdout.write('NodeBB Setup Completed. Run \'./nodebb start\' to manually start your NodeBB server.\n');
+
+			// If I am a child process, notify the parent of the returned data before exiting (useful for notifying
+			// hosts of auto-generated username/password during headless setups)
+			if (process.send) {
+				process.send(data);
+			}
+		}
+
+		process.exit();
+	});
+}
+
+exports.setup = setup;
+exports.webInstall = install;