Introduce linker flags vs. library flags in jpm
in a backwards compatible way - most usage of lflags was for library
flags, so we will preserve that behavior.
Make install and uninstall commands variadic.
Add :libs option to many decalre commands. This behaves much like
lflags, but will be places after all linker flags are given.
Dedent has been moved to spork as misc function.
There are two many different, incompatible ways to 'dedent'
as string, and it seems rather specific to add to the core like it is.
