Merge pull request #75 from ujihisa/master

the spec change at 6cab5edb broke clojure/process_manager and scala/process_manager
Fix the document

Default value of tempfile option.
Normalize the exec option
Add nimrod to default config
Merge pull request #78 from joelmo/master

Add nimrod to default config
Improve Nimrod support
update vital. The latest version of ProcessManager deprecated stop(), so modified runner/process_manager to use kill() instead.