Cleaned up whitespace in library files
Converted tabs to spaces
Normalised indenting to 4 spaces
Merge pull request #117 from njh/whitespace

Cleaned up whitespace in library source files
Removed erroneous "multicast" handler in tcp handler. (Was unsafe and didn't actually work.)
Updates to doxygen documentation.
Document TCP function (hopefully easier to follow now).
Renamed mymask to netmask in testDHCP example
Merge pull request #118 from lmillefiori/master

Fix testDHCP example