Use ugrep if available and some other improvements

• Add support for ugrep. (Debian bug #1002509)
• Treat SVG, tiff as binary.
• Instead of saving the prefiltering's parallel temp results into temp files, we channel everything to STDOUT and merge with a pipe. (Debian Bugs #1026664, #1026771)

Full Changelog: v0.4...v0.5*

Functionality improvements

• Option to respect .gitignore
• Exclude .mov, .mp3 and .jar
• -w option to override whitelist file
• Use .github/.misspell-fixer.ignore automatically if it exist

Build related changes

Test execution related changes.

Documentation and packaging updates

Documentation and packaging updates

Initial release

Misspell-fixer is a simple tool for fixing common misspellings, typos in source code.