biocadmin prepareRepos code is inefficient/repetitive #55
Description
The code called by the preparerepos-*.sh scripts (mostly in thee biocViews package) has a lot of inefficency and redundancy. For example, all package tarballs are iterated through multiple times, each time to extract a single file (README, vignette, INSTALL, etc etc). All of this could be done in a single iteration.