Wide lane support is enabled by setting modear to 'wide-lane' (ARMODE_WL).
Wide lane AR fix and hold can be enabled using the wlmodear option.
Also includes an example configuration file for using rtkrcv with
Swift Navigation's Skylark Cloud Correction Service.

wide-lane corrections from Skylark:
1. -w argument enables widelane integer ambiguity resolution
2. -z argument to output SPP position if no RTK solution
3. -rb argument to specify reference position to use for base station.
   New posopt (POSOPT_RINEX_DYN==6) to read base station position from
   RINEX header and subsequent site occupation events

1. allow Wide Lane Integer Ambiguity Resolution (with optional Fix and Hold) to be selected
2. allow base station positions to be read from RINEX Header and Site Occupation Events

Add support for the following functionality to RTKNAVI:
1. Support for Wide Lane Ambiguity Resolution
2. Support for Wide Lane Ambiguity Resolution with hold and fix
3. Resize Options window for larger AR mode labels

(cherry picked from commit c58b388)