[build] Add Makefile.wmsdk
[experiment] Make POSIX comm layer work with lwIP
[feature][build] Use WMSDK's own free & alloc
[build] Fix various build issues using new variables
[wmsdk][build] Use wmprintf for debug output
[posix][build] Better wrapper around POSIX-compatible sockets
[posix][build] Provide an option to disable timeouts -

currently this is more of workaround which needs investigation.
Merge pull request #43 from xively/wmsdk-with-lwip-posix-compat

Adding WMSDK port with lwIP/POSIX compatibily