Added ==smoke-test support and ciftest command. Commands can now define a "==smoke-test" section in their CIF files, which defines a snippet of fshell script that will be run as part of "fshell smoketest" or by invoking ciftest directly. See the ciftest documentation for more details. Added ==smoke-test sections to a few commands, the ones that were easy to test!

code
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	font-family: monospace;
	background-color: #FFFDDF;
	padding:1px;
	border:1px solid #EEECCE;
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body
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	background-color: #FFFFFF;
	font-family: verdana, sans-serif;
	font-size: 12px;
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