E-mail: Use BPathFinder to collect add-ons.

E-mail: fixed GCC4 build.

mail_daemon: cleanup, 30s auto check startup delay.

* Refactored new message retrieval a bit, so that the notification strings
aren't duplicated.
* The daemon now waits 30 seconds before doing the first mail check.

Major mail protocol/filter settings rework.

* Instead of abusing BArchive::Archive() we now use a BMailSettingsView as
a base view for all filter/protocol settings that works with
BMailAddOnSettings.
* Cleanups in E-mail which is now completely layout friendly. But also still
crashes when changing the views.

E-mail now also builds, but doesn't work yet.

E-mail: fixed GCC4 build.

mail_daemon: cleanup, 30s auto check startup delay.

* Refactored new message retrieval a bit, so that the notification strings
aren't duplicated.
* The daemon now waits 30 seconds before doing the first mail check.

Major mail protocol/filter settings rework.

* Instead of abusing BArchive::Archive() we now use a BMailSettingsView as
a base view for all filter/protocol settings that works with
BMailAddOnSettings.
* Cleanups in E-mail which is now completely layout friendly. But also still
crashes when changing the views.

E-mail now also builds, but doesn't work yet.