simplify padding calc by avoiding redundant len() call
string.find(substr) > -1  ==>  substr in string
Added docs for new execution & state modules
Unmonitor services
Monitor services
Small rST fixes
Added docs files for new modules
Merge pull request #4656 from hulu/simplify-padding-calculation

Simplify padding calculation by avoiding redundant `len()` call.
Merge pull request #4659 from deniskin82/monit_features

Monit features
Merge pull request #4657 from hulu/use-in-oper-instead-of-find

string.find(substr) > -1  ==>  substr in string
fix nearly all undefined var errs reported by pyflakes
Merge pull request #4667 from hulu/fix-undefined-vars

fix nearly all undefined var errs reported by pyflakes