Merge pull request #14 from steffesm/development

Fix for "IP Core Versions not matching ISE Version #3"
added gradle-wrapper and ignored project files of my Java IDE
tukl-msd/msdlib.loopy#8: added generation of checksum of the project configuration and output to constants-file of board- and client-api; adding of protocol to check correct version still tbd
started integrating the checksum into the board/host-side protocol
added support for checksum checks in the host-side driver/api
bug fixes
show error message to console at least if checksum did not match.
added new checksum-check to the example main.cpp files
fixed bug related to using multiple AXI stream (related to issue tukl-msd/msdlib.loopy#16)
trying to fix bad endian encoding of the packages (should be big-endian, but are little-endian)
added missing include
fixed host-side and trying to fix board-side
fixed but in board-side driver regarding reading of a network package payload
using ntohl() and htonl() on the board side did not work quite as expected; try using the bytes itself
small fix
getting the data types of assignments right is not easy
Merge pull request #18 from mweberUKL/development

Checksum and multiple modules/axi ports fix