Sort PackagesList by name and version
In PackageList, sort the package version from latest to oldest

This enables us to return the latest version of a package when no version is specified rather than the oldest.
Therefore, we don't need to modify the search algorithm to return the latest version of a package.
Add AUTHORS files.
Fix link to Ryan Uber's profile.
System test on conflicting files when publishing. #65
Fix reference to home directory. #24
Build under go1.3 as well. #72
Merge branch 'deterministic_package_search' of https://github.com/simonaquino/aptly into simonaquino-deterministic_package_search
Add Simon Aquino to authors. #67
Enable system tests fixture under go1.3 as well. #72
Simplify Makefile.
Insert into right position when adding as well. #67
Merge branch 'simonaquino-deterministic_package_search'
Merge smira/master into pull_multiple_packages

Resolved conflicts arisen following smira's new commits into master.