* moved dev to version 3.1.1
* laid ground for n2n-route tool
* adapted code style
* overhauled n2n-route's tool program logic and removed route code from edge
* added missing initialization of federation's purgeable field
* lifted un/purgeable confusion
* added warning about removed -n cli option
* realized that Windows does not offer inet_aton()
* removed -n option documentation from edge's man page
* slightly simplified n2n-route program logic
* applied more logic changes to n2n-route tool
* added 'info' read command to edge's management port
* corrected indention
* added Linux route control to n2n-route tool
* temporarily restricted n2n-route tool to Linux only
* We must be over the routing!
* pulled default gateway change detection into main loop to cover mobile use, and added devstr_t type
* corrected use of new UNPURGEABLE - so far gone unnoticed
* addresses possiible address issue
* i broke it
* reverted bad ideas
* added command line options, help text, and prevented vpn gateway being used for supernode/peer traffic routes
* added option to manually provide default gateway, also verbosity options
* getting there
* added option to limit networks to be routed (-n), adapted documentation
* fine-tuned minor things
1. CMakeLists.txt added to automatically obtain the revised version number from the git repository.
2. Adjusted some header files to fix Windows platform compilation errors.
3. Eliminate some compilation warnings.
