--minifyer not documented

[donpark]

following needs to be documented and included in command-line help as well:

1. default minifier is yui_compressor.
   1.1 if yui_compressor is not installed, javascript merge will fail.
   1.2 if only closure_compiler is installed, javascript merge will fail.
2. --minifyer (-m) option controls which minifier is used.
   valid values are 'yui_compressor' and 'closure_compiler'.

1.1 and 1.2 should be remedied so:

juicer defaults to whatever minifier is installed.

if more than one minifier is installed, either prompt user as well as informing them of -m option or go with default and inform user of -m option.

if no minifier is installed, prompt user to install either yui_compressor or closure_compiler.

[jamestomasino]

What about an option to not minify?

[cjohansen]

--minifyer ""

[jamestomasino]

Ahh, excellent! Thank you.