python instructions and added erlang instructions
added sudo to install marvel
Description for installing rabbitmq on ubuntu

rabbitmq 3.2.4-1 is included in ubuntu repos, use invoce-rc.d to start
Added mongodb instructions for deb systems
Added blank line to proper heading
Added new line below to get proper heading
new line again
Instructions for installing nginx on apt-get based system.
adding untar command to uwsgi in install document.
Fixing format error in installation documentation.
Merge pull request #110 from BjornArnelid/master

Closes #81
alter plugin registration system to use pure lists and sets for efficiency
update to better child document representation
update child events representation
allow custom application event posting via http and allow plugins to specify index and doctype