Added signal refresh rate option
modemmanager: update readme.md
Added description for added proto options.
Added compile option to compile --with-at-command-via-dbus for allowing
AT commands to modem without --debug flag
Changes to be committed:
modified: net/modemmanager/Config.in
modified: net/modemmanager/Makefile
modified: net/modemmanager/files/modemmanager.init
modified: net/modemmanager/files/modemmanager.proto
modified: README.md
Signed-off-by: Valtteri Holopainen <valtsu@gmail.com>