Support type triggers (#96)

* implement mirrorlist package generator

* implement keyring package generator

* docs update

* do not skip empty lines

* fill remote source for local packages

* faq update

tests/testresources/core/ahriman.ini

@@ -25,6 +25,7 @@ ignore_packages =
 makechrootpkg_flags =
 makepkg_flags = --skippgpcheck
 triggers = ahriman.core.report.ReportTrigger ahriman.core.upload.UploadTrigger
+triggers_known = ahriman.core.support.KeyringTrigger ahriman.core.support.MirrorlistTrigger
 
 [repository]
 name = aur-clone
@@ -33,6 +34,13 @@ root = ../../../
 [sign]
 target =
 
+[keyring]
+target = keyring
+
+[mirrorlist]
+target = mirrorlist
+servers = http://localhost
+
 [remote-push]
 target = gitremote