Use -d for xargs in lvu
optional_depends recommended choice

Add an optional 5th option to set the default choice for
optional_depends.
Removing unnecessary module_held checks.

module_held implies module_installed
Added quotes around file arguments of wc
Merge pull request #65 from cavalier38/lvu-xargs

Use -d for xargs in lvu
Merge pull request #68 from cavalier38/quotes

Added quotes around file arguments of wc
Merge pull request #67 from cavalier38/clean-up

Removing unnecessary module_held checks.
Merge pull request #66 from cavalier38/recommended-depends

optional_depends recommended choice
rework modules on lunar renew and only update know depends
Merge pull request #69 from cavalier38/find_depends

rework modules on lunar renew and only update know depends