rename example_executor to shell_executor
more log info
using abs path
refactor for support dynamic job arguments
dynamic job arguments support
need save for temporary
fix comments
Update notifier.go
Update notifier.go

clean up
added ldap authentication
Merge pull request #1 from terro/master

added ldap authentication
Update README.md
made ldap as an option in config.ini
Merge remote-tracking branch 'upstream/master'
Merge pull request #2 from terro/master

made ldap as an option in config.ini
tasks gc support
fix panic
add username based authorization
Merge remote-tracking branch 'upstream/master'

Conflicts:
	scheduler/http_srv.go
fixed ldap bugs