Added additional flag to generate the satis build for a single package. This helps to speed up the satis run if you have a lot of repos.
Ignore alias packages and minimum stability similar to the default handling of packages.
Added handling for multiple packages in the filtering process. You can now pass a list of packages that satis should built the repos for.
packages.json and web-view is now correctly updated on filtered updates.
Fixed the handling of metapackages

Metapackages don't have content, so they should be skipped when generating archives.

Closes #134
Optimized the generation of the packages.json and index.html in case satis is run for a single package.
Minor optimization in foreach loop.
Got rid of duplicate foreach loop when selecting the packages.
Merged in the latest changes from master and changed the logic to rely on the includes functionality introduced by #132.
Merge pull request #135 from stof/patch-1

Fixed the handling of metapackages
Merge pull request #125 from bitExpert/feature/single_package_build

Allow to run a satis build for one repo/package
Making sure that the single package handling logic works if requires are defined in the configuration file.
Merge pull request #142 from bitExpert/feature/single_package_build_requires

Single package build when requires are defined
Fixed PEAR packages mirroring
Identations changed to spaces
Copy function call changed to Filesystem::rename
Tweak dependencies
Index template updated to display package support information (if exists)
fix tabs -> spaces
fix tabs -> spaces