following up on #3094
- rename `THE_CASK_LANGUAGE.md` to `CASK_LANGUAGE_REFERENCE.md`
- expand `CASK_LANGUAGE_REFERENCE.md` to more fully specify the Cask DSL
- add sections: "Casks Are Ruby Classes" and "The Cask Language Is Declarative"
- import content from `FAQ.md` to `CASK_LANGUAGE_REFERENCE.md`, create multiple sections
listing all stanzas according to category.
- document which stanzas are permitted multiple times
- add previously undocumented `before_install` and `before_uninstall`
- doc that `Hardware::CPU.is_64_bit?` (and 32-bit) are acceptable in conditionals
- doc that `:target` may contain an absolute path (this works more reliably after #3075)
- doc that `uninstall` is optional in the DSL, but required by the community
- link examples
- standardize mixed language on "stanza" over "field"
- further shrink `CONTRIBUTING.md` by deleting rarely used stanzas
and referencing `CASK_LANGUAGE_REFERENCE.md`
Make caveats a first-class member of the Cask DSL. It no longer has to
be specified with "def caveats", but can be given as "caveats do ... end"
as with after_install blocks.
In addition, create a mini-DSL which can be used within caveats blocks,
providing standard messages when manual installers must be used,
reboot-required, etc.
Add alternate form: caveats can also accept a compile-time string for
simple cases.
This is 99% compatible with old Casks, as it still works by defining
a caveats method. However, all Casks containing caveats are cleaned
up and adapted according to the new DSL.
Full docs in CONTRIBUTING.md.
Mostly this is spelling, capitalization, and whitespace. One
substantive change is updating the list of fields given in FAQ.md
to match CONTRIBUTING.md. Also incorporates suggestions from @NanoXD,
removing an old paragraph from FAQ.md re: nested containers.
