Add FAQ file
Install documentation files
Merge pull request #145 from rworkman/docs

Add FAQ and install docs during make install
Add new FAQ file to changelog
Optionally install Thunar support for blueman-sendto

Suggested by GreenLunar in Issue #26
https://github.com/blueman-project/blueman/issues/26
Renamed --enable-sendto to --enable-nautilus-sendto

This clarifies that the option enable nautilus-sendto, as there
is also a thunar-sendto option now.