Small correction in file URI protocol check
Refactor code for updatePackages() and oldPackages().  Remove some arguments, rename others. #41.  Updated unit tests. #48
Removed locally stored miniCRAN repo. This proved problematic when used for testing - the original use case. Partially reverts 05dcfb8 #43
Pass all required arguments to pkgDep.R()  #48
Use compareVersion() to more reliably compare version numbers between package updates. #49
Refactor unit tests to have better coverage but less duplication in test code. #48
Improve handling of local repo file paths, e.g. using normalizePath()
Update documentation #40