macOS Catalina Support

Issues addressed:
#54 and #81 should be addressed by building with latest Xcode.
#30, #32, #55, #67, #86 and #87 should be fixed using the new UTI types from 4f40c41

Many thanks 🙇 to @tessus @flemingm @kant and @smittytone for submitting PR's to address these issues.

Release 1.4.4

Includes The fix for #49 by @comawill with #56
Also has a couple of xCode recommended updates.

Closing some long standing issues

Issues:
#34 is fixed by #39 (thanks to @bestwnh)
#27 is fixed by #37 (thanks to @comawill)
#29 should be fixed by 1e41f37 (I don't have a 32bit Mac so I cannot verify)

New things:
#47 adds Travis CI support (thanks again @comawill)
#41 removes a third party dep (thanks @regexident)
4ed3730 runs qlmanage -r after the build so you don't have to

Minor release after removing old redundant files

1.4.2

1.4 Release

Merged upstream patch that speeds up previewing large files.