[ui] Fix "*" link not working in carto reference (see mapbox/tilemill#1693)
Force the project name to a string or path.resolve will ignore it later.
Without this exports with only digits in their name cannot be exported
Merge pull request #1890 from Ryanl92/integer-export-fix

Force the project name to a string or path.resolve will ignore it later.
expose tiff and jpeg image formats in command line interface
amend #1890 to ensure that if no argument is passed on the command line then we still get proper usage rather than a toString exception
pull in tilelive-mapnik@0.5.0
Merge pull request #1854 from yohanboniface/fix-all-elements-link

[ui] Fix "*" link not working in carto reference (see mapbox/tilemill#1693)
fix application crash when offline and user tries to access MapBox s3 data repo - closes #1911
pull in fixes from master