Updated _directories.erb to add support for 'SetEnv'

Updated _directories.erb to add support for 'SetEnv'.
Add configurable options for mpm_event
Add basic mpm_event docs, fix formatting, appease older ruby
Merge pull request #934 from muresan/patch-1

Updated _directories.erb to add support for 'SetEnv'
Merge pull request #939 from stumped2/feature/master/mpm_event

Add configurable options for mpm_event