added mtools box graphic in README.
pulled new mtools.png file from develop branch.
Update INSTALL.md

added link to #203 and link to additional dependencies from Installation section.
Update INSTALL.md

Added Ubuntu install walkthrough.
Update INSTALL.md

slight title changes.
added mgenerate reference.
mplotqueries: Add --output-file flag
added changes for 1.1.6, bumped version.
added more changes to changelog.
skipping mlaunch tests temporarily until issues are sorted out.
Merge branch 'feature-265-mplotqueries-output-file-no-window' of github.com:dpercy/mtools into dpercy-feature-265-mplotqueries-output-file-no-window
added mplotqueries --output-file option.
Merge branch 'release-1.1.6'
Merge branch 'master' of github.com:rueckstiess/mtools
bumped version to 1.1.7dev.