sjcl.mode.cbc is undefined if I install from npm

[Lukich]

sjcl hosted on npm doesn't have cbc mode in it, so any calls to sjcl.mode.cbc.decrypt are returning an error. Git and documentation still reference it, though.

[Lukich]

So I dug further and it looks like I need to update config.mk to include cbc. However, when I did that, it turned out that compress directory doesn't have compiler.jar. If I clone from Git, compiler.jar is present.