gnucash-on-windows master: Multiple changes pushed

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash-on-windows/commit/5de8f8be (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/0bc21bc8 (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/caab4a16 (commit)
	 via  https://github.com/Gnucash/gnucash-on-windows/commit/53ee6621 (commit)
	from  https://github.com/Gnucash/gnucash-on-windows/commit/265e47b2 (commit)



commit 5de8f8bee7e446eae99d981519b2e79ff9190914
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Thu Feb 2 18:04:57 2017 +0100

    Make gtest work on Windows
    
    There is a PR that got merged after release-1.8 that's needed for mingw.

commit 0bc21bc8d8b23420a233bf1b289b593e16d6419c
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Thu Feb 2 15:28:39 2017 +0100

    Install gtest/gmock
    
    GTest based tests are said to fail still on Windows, but
    with this GTest can be made a mandatory build dependency for gnucash.
    Just don't run any tests on Windows...

commit caab4a16bb605556ac37fb9baa13a7cbade4f94c
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Thu Feb 2 15:25:59 2017 +0100

    Find boost library via the BOOST_ROOT environment variable
    
    Note this currently only works for the autotools based build path.
    The cmake configuration has this hard-coded at the time of this commit.
    I will change that in a future update.

commit 53ee6621dfbc01d9f8ab2a01290433f23c3dcbe3
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Jan 27 17:08:43 2017 +0100

    Drop unused dependency from gwenhywfar



Summary of changes:
 defaults.sh     |  4 ++++
 install-impl.sh | 44 +++++++++++++++++++++++++++++++++-----------
 install.sh      |  3 ++-
 3 files changed, 39 insertions(+), 12 deletions(-)