refactor :stderr => :silence

replace with :print_stderr => false

The double test on options[:print_stderr] in system_command.rb
is intentional, and temporary.
recast :print => true as :print_stdout => true

in Cask::SystemCommand
remove :print_stdout => false

this is the default, and need not be specified
switch to %Q{} for complex quoting
add devscript `irregular_cask_whitespace`
whitespace nits in antetype
whitespace nits in atmonitor
whitespace nits in au-lab
whitespace nits in baiduinput
whitespace nits in controllermate
whitespace nits in crosspack-avr
whitespace nits in curio
whitespace nits in datagraph
whitespace nits in diffmerge
whitespace nits in eloquent
whitespace nits in escritorio-movistar
whitespace nits in j
whitespace nits in mkvtoolnix
whitespace nits in qrfcview
whitespace nits in rust