finally got smart and added a -e switch to addpath

used to be you would have to do this:
-	setenv SOMEVAR `addpath -b SOMEVAR /new/dir/to/add`
but now you can do this:
-	eval `addpath -eb SOMEVAR /new/dir/to/add`
so less repetition! (especially handy with long env var names, like LD_LIBRARY_PATH)
it also works for bash, if you're into that sort of thing
going to try to start storing local rc files now

this is handy when you want two machines to be very similar
added section in makeln to build the file
also finally fixed the buglet in make_link (in functions):
-	it didn't work if the target symlink was a dir (now it does)