Better info support

v0.6

Bump version to v0.6

More robust, compliant on more systems

Features

• eless can now run on a system having emacs 22.1 too.
• Tested to work on macOS/BSD system (removed GNU grep and GNU sed dependencies).
• Use of Bash trap for robust cleanup of temp files on script exit.

Meta Features

• Now eless is auto-tested on Travis on emacs versions 24.4 to 26.x (and master branch too).
• Doc-site is auto-built on Netlify directly from Org (so no need to commit HTML files).

v0.3: Allow hyphens in man page titles (like GIT-LOG); Don't save ido hist

Skipping ido history saving speeds up eless quitting