Typos and grammar
Merge branch 'readthedocs' of github.com:radical-cybertools/radical.pilot into readthedocs
added figure to tutorial main page
Merge branch 'readthedocs' of https://github.com/radical-cybertools/radical.pilot into readthedocs
Shuffled TOC around. See ticket #352
Merge branch 'readthedocs' of github.com:radical-cybertools/radical.pilot into readthedocs
Merge branch 'readthedocs' of github.com:radical-cybertools/radical.pilot into readthedocs
Document correct error message from ssh errors.

This was lingering for quite a bit, the old error can't happen anymore with the current implementation.
fixed #365 and #347

Expanded section 3 and renamed it to "Using Local and Remote HPC Resources".
Tickets #365 and #347 were addressed in the process.
Merge branch 'readthedocs' of https://github.com/radical-cybertools/radical.pilot into readthedocs
basic SSH instructions
Merge branch 'readthedocs' into devel