Modified to indent instructions on opening a terminal in each major operating system
Changed formatting in Getting Started section and reworded note to
remind users to change to oh-mainline before continuing.
Fixed bullet list format in Getting Started
Fixed typo for formatting
Fixed a typo in Gettting Started section
Merge pull request #148 from willingc/master

Updated documentation to improve installation instruction's clarity that user must be in oh-mainline directory before managing or running server