Fixing typo
Better description about webservers
Better text suggestion from Turini
Better text suggestion from @Turini
Typo
Typo again
Updating jetty-env.xml
Updating jetty-env.xml for PT docs
Removing jetty-env
Removing jetty-env
Merge pull request #711 from caelum/ot-docsjuly28

Some dependencies and prerequisites docs improvements