Package cache

[ThomasNieto]

Currently it takes about 3.5-5 seconds to run apt-cache search . --full and parse all the packages. To reduce the time it takes, implement a package cache.

• Derive AptProviderInfo from ProviderInfo
• Create dictionary property to store package cache
• Create timestamp to keep track apt-get package cache apt-config dump | grep Dir::Cache::srcpkgcache file location
• Discover package names with apt-cache pkgnames
• If srcpkgcache updates then rebuild package cache