Remove pointless -working flag.

This option is not needed. The new working directory is always set to
the application's ROOT directory.
Add info about how to exit console shell.
Update windows batch file.
Remove -q.

It doesn't work and breaks HHVM.
Merge pull request #48 from cakephp/shell-cleanup

Shell cleanup
Add cli_bootstrap.php.

Add a CLI specific bootstrap override file. This file is intended to be
used for CLI specific config and bootstrapping. For example, by using
separate log files for web & cli we can avoid annoying file permission
issues. This addresses cakephp/cakephp#2634 and is part of
cakephp/cakephp#3325
Merge pull request #49 from cakephp/cli-bootstrap

Add cli_bootstrap.php.
Remove PHP 5 and fix copyright in top docblocks
Merge pull request #50 from bcrowe/fix-php5

Remove PHP 5 and fix copyright in top docblocks
Correct filename for cli bootstrap
Merge pull request #51 from dereuromark/master-cli

Correct filename for cli bootstrap
update composer.json
Merge pull request #52 from php-engineer/master-composer

update composer.json
Only mention composer as the officially supported install method.

It will make things easier for us and less documentation to worry about.
Merge pull request #53 from ADmad/composer-only

Only mention composer as the officially supported install method.
merge in origin/master
update composer.json