Bugfixes and layering

In this release we fix some memory leaks. We also add layering to reduce false positives. Layering employes multiple layers of bins. Anomaly must be detected in each layer to lead to an alert being exported.

Further, we have renamed some files:
as.cc -> amonsenss.cc
executable target is now amonsenss
as.config -> amonsenss.config
amon-senss.config -> autoconfig

We have also added new files:

1. A naive log rotate solution: files rotate and anum
2. A perl script sum_alerts, which works like read_alerts but produces machine-readable alerts that you can then parse automatically if you like. This is useful if you have old traces that you want to process to evaluate AMON-SENSS.