add 'rake all' for all specs (core and services)

Signed-off-by: Jing Gong <jgong@rbcon.com>
remove unneccessary require

Signed-off-by: Jing Gong <jgong@rbcon.com>
update README.md; update rake service task to include services_spec cases

Signed-off-by: Jing Gong <jgong@rbcon.com>
Revert "change file mod"

This reverts commit 9d4124ba05bcd9da60b1cc4540504a10df49f97a.
Merge branch 'tasks'