boost::Expected fix for ODR issue on Windows
commenting unreferenced variable
farmer exec path changed to /opt/maidsafe/sbin
Avoid running maidsafe_find_git.cmake more than once.
Merge pull request #183 from mmoadeli/MAID-560

boost::Expected fix for ODR issue on Windows
Merge pull request #184 from benjaminbollen/MAID-502_installers

MAID-502 farmer exec path changed to /opt/maidsafe/sbin
Merge pull request #185 from Fraser999/MAID-602

Avoid running maidsafe_find_git.cmake more than once.