first version of OpenBSC to be confiugred by config_file

We nowuse the interactive VTY layer to configure OpenBSC. You can
create BTS's, set their parameters as well as TRX's and their
timeslots on the telnet UI.

What is lacking so far:
1) we only read the config file once and don't properly react
   to changes performed at runtime
2) ip.access BTS supportis not integrated yet

There are three config files as examples
* openbsc.cfg.1-1: single BTS, single TRX
* openbsc.cfg.1-2: single BTS, dual TRX
* openbsc.cfg.2-2: dual BTS, dual TRX
diff --git a/openbsc/src/openbsc.cfg.1-1 b/openbsc/src/openbsc.cfg.1-1
new file mode 100644
index 0000000..acd6681
--- /dev/null
+++ b/openbsc/src/openbsc.cfg.1-1
@@ -0,0 +1,51 @@
+!
+! OpenBSC configuration saved from vty
+!   !
+password foo
+!
+line vty
+ no login
+!
+network
+ network country code 1
+ mobile network code 1
+ short name OpenBSC
+ long name OpenBSC
+ bts 0
+  type bs11
+  band GSM900
+  location_area_code 1
+  training_sequence_code 7
+  base_station_id_code 63
+  oml e1 line 0 timeslot 1 sub-slot full
+  oml e1 tei 25
+  trx 0
+   arfcn 121
+   max_power_red 0
+   rsl e1 line 0 timeslot 1 sub-slot full
+   rsl e1 tei 1
+    timeslot 0
+     phys_chan_config CCCH+SDCCH4
+     e1 line 0 timeslot 1 sub-slot full
+    timeslot 1
+     phys_chan_config SDCCH8
+     e1 line 0 timeslot 2 sub-slot 1
+    timeslot 2
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 2 sub-slot 2
+    timeslot 3
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 2 sub-slot 3
+    timeslot 4
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 3 sub-slot 0
+    timeslot 5
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 3 sub-slot 1
+    timeslot 6
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 3 sub-slot 2
+    timeslot 7
+     phys_chan_config TCH/F
+     e1 line 0 timeslot 3 sub-slot 3
+