Composer fix; Credis fix

Properly detects/includes Composer autoloader using same logic as PHP-Resque itself.
Rewrote the zRangeByScore() call to use the syntax expected by phpredis.  This might make the code break without phpredis installed;
  will test and comment before a pull request is issued.

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>
Added ResqueScheduler::VERSION constant

This fixes the error thrown when trying to set the proctitle if the constant doesn't exist.

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>
Composer-related changes as in PHP-Resque 1.3

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>
Updated the README for the Composer-related changes

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>
create change log
README.markdown -> README.md
update composer requirements, remove minimum-stability
update composer.json with valid email address
Merge remote-tracking branch 'origin/bugfix-basic-cleanup'
Merge remote-tracking branch 'origin/feature-composer-autoload'

Conflicts:
	bin/resque-scheduler

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>
Merge remote-tracking branch 'origin/fix-const-version'

Conflicts:
	lib/ResqueScheduler.php

Signed-off-by: Daniel Hunsaker <danhunsaker@gmail.com>