Add fseventer
re-implement RCWebColorPicker as colorpicker

This Cask dates from before the existence of the colorpicker artifact type.
- chg artifcact type to colorpicker
- remove caveats
- rename to match other colorpickers
Add a cask for cert-quicklook plugin
add man page brew-cask.1
make sure "after" blocks really run last

and make it self-documenting by changing class name
support CAB archives
enforce: certain DSL elements may appear only 1x

add CaskInvalidError exception, which ought to be used in
several other places as well
add missing `HOMEBREW_CACHE_CASKS.mkpath`

If `mkpath` must be done for the parent dir, then it certainly
must also be done for the child dir.
rename class to `Cask::CurlDownloadStrategy`

To make room to use some of the other download strategies
classes provided by Homebrew, be explicit that we are currently
using only the curl class.
Change default hash to SHA-256.
Upgrade iSumbler.app v100 GM Candidate 5
Merge pull request #2776 from albertico/istumbler

Upgrade iSumbler.app v100 GM Candidate 5
Add UberPOV.
devscript: support pkg bundles (pkg is a dir)
Merge pull request #2782 from rolandwalker/pkg_bundles

devscript: support pkg bundles (pkg is a dir)
devscript: add new id and app sources

for list_apps_in_pkg and list_ids_in_pkg
Merge pull request #2783 from rolandwalker/new_pkg_sources

devscript: add new id and app sources
devscript: add list_id_in_kext

extracts the bundle ID from a kext on disk
Merge pull request #2784 from rolandwalker/list_id_in_kext

devscript: add list_id_in_kext
Merge pull request #2762 from rolandwalker/rename_curl_download_strategy

rename class to `Cask::CurlDownloadStrategy`