rview binary for MIRTK

[schuhschuh]

Hi @baiwenjia, nice project! I just thought I'd drop a note that users running macOS or Ubuntu may also download the MIRTK "view" binary (i.e., rview with slight changes which can read MIRTK transformation files) without need to enter their personal details. The binary, when copied to the $MIRTK_PREFIX/lib/tools/ directory of the MIRTK installation, can be executed using:

mirtk view [<image>]