Replace file copies using hardlinks

Current version

hardlink requires the following formulae to be installed:
xz 5.2.3 General-purpose data compression with high compression ratio
pkg-config 0.29.2 Manage compile and link flags for libraries
gnu-getopt 1.1.6 Command-line option parsing library
pcre 8.42 Perl compatible regular expressions library

Recent formula history

ilovezfs hardlink: use https for homepage and stable url (#10999)
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Dominyk Tiller hardlink 0.3.0
Adam Vandenberg hardlink devel 0.3.0 RC2
Don Morrison hardlink 0.2.0

Formula code at GitHub