SC2154: Fix false positive on `local`

Updated readme installation instructions

Added installation instructions for Solus distro.

Documented binary cabal install for MacOS

Installing haskell binaries is 50x faster than compiling it from source.

List available output formats in --help output

Fix incorrect detection of bash-style substring expansion (issue #950)

Substring expansion detection only considers ':' as a separator..  It
needs to avoid triggering for ":-", ":=", ":+" and ":?", since they
mean other things.

This is a regression introduced by commit
a90b6d14Signed-off-by: NMartin Schwenke <martin@meltin.net>

Add Stack as install method