Don't parse ngrep output anymore

* Remove ngrep compile options
* Force libpcap compile options
* Add command line arguments (hvd:I:O:)
* Add version and usage output
* Allow offline mode filtering
* Remove unused variable in ui_call_list.c
Include config.h template
Allow saving selected dialogs into pcap file #13

Add options in save dialog to choose between all packets or
selected calls packets
Add some parameters for ngrep dummies
Merge branch 'drop_ngrep'