Also changes some heading levels so only one primary
heading appears per page.

Fix small typos in How-to-Create-and-Maintain-a-Tap.md

Avoids unnecessary conflicts when a previously non-keg_only formula is
in the way by prioritizing keg_only before non-keg_only formulae.

This change is motivated by the upgrade of gnupg 2.0 to 2.1, since the
latter no longer depends on the gpg-agent formula, which, even if made
keg_only, still causes the link step to fail for 2.1, as gpg-agent's
non-keg version won't have been upgraded to the keg_only version at that
point (alphabetically gnupg precedes gpg-agent).

Add extend/os/linux/system_config.rb

determine_path: Fix tests FormulaUnavailableError

Report the Linux kernel, OS, and gcc versions.

Use a `Formulary`-like approach to load Casks.

add command 'cask outdated'

Add test for command help strings.

Remove `sort` from `each_artifact`.

secure urls + remove -k from in-doc curl command

Added highlighting of installed casks to cask search

Remove `dsl` parameter from `Cask::new`.

Update RuboCop-Cask to 0.12.0.

Querying-Brew.md: directors => directories

OPTIMIZATION_FLAGS: Use -march=native for Penryn

Default to `sudo: false` for `installer/uninstall :script`.

Use -march=native for Penryn as for other systems rather than
-march=core2 -msse4.1.

docs: add markers to ordered lists and sublists

Revert "audit: exempt wine's deps from the universal deprecation"

While GitHub allows a single space to denote a sublist, Jekyll is not
so lenient. It also seems unable to handle ordered sublists.

Add `#installed_caskfile` method to `Cask` class.

Use `CaskLoader.load_from_file` in `Auditor`.

keg: Skip relocation when dylib ID/install name doesn't change.