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 man page brew-cask.1
add HOMEBREW_TAP_FORMULA_REGEX constant in tests

because our code tries to use it when throwing exceptions
also move HOMEBREW_BREW_FILE from doctor_test.rb to test_helper.rb
make sure "after" blocks really run last

and make it self-documenting by changing class name
Loud caveats against installing Dashboard Widgets

And doc note, pending a fix of the underlying issue.
suppress prompt to move Alfred to /Applications
support CAB archives
realpath hygiene for external commands

For external commands which do not support the doubledash convention
(#2613), wrap file arguments in Pathname.new(file).realpath at the
very last minute.  This provides a guarantee against surprises caused
by unusual filenames which might be misinterpreted as flags.
Merge pull request #2623 from rolandwalker/realpath_failsafes

realpath hygiene for external commands
Merge pull request #2746 from rolandwalker/alfred_suppress_move

suppress prompt to move Alfred to /Applications
iStat Menus 4.20
enforce: certain DSL elements may appear only 1x

add CaskInvalidError exception, which ought to be used in
several other places as well
oclint after_install/uninstall is redundant

this is correctly handled by the `binary` artifact
Merge pull request #2554 from rolandwalker/caveats_on_dashboard_widgets

Loud caveats against installing Dashboard Widgets
Merge pull request #2749 from rolandwalker/simplify_oclint

oclint after_install/uninstall is redundant
VLC 2.1.3
Merge pull request #2752 from ahbeng/vlc

VLC 2.1.3
updated Postgres App to 9.3.2.0-RC2
Mactracker 7.3