libusb: Require at least libusb-1.0 version 1.0.9.

This fixes the following build error (see issue #76):

  /usr/local/lib/libuhd.so: undefined reference to `libusb_error_name'

The libusb_error_name() API call was added in 1.0.9.
libsndfile: Fix satisfy_deb line.

libsndfile-dev is a virtual package ("apt-get install libsndfile-dev" will
actually install libsndfile1-dev). The current code cannot properly
handle/detect it as being available ("apt-cache show" output is different
from what it expects), hence it'll try to build from source instead.

Fix this by adding libsndfile1-dev as alternative.
Fix deb version parsers (and libav package).

The current versions of e.g. libavcodec-dev in Debian unstable look
like this: "6:11-1". Fix the version parsers to handle that.

This fixes the deb install/check for the libav recipe.
gr-specest: added dependencies to recipe
Fix insecure tempfile warning
make the app store scrollable
Merge pull request #104 from uwehermann/libusb1_fix

libusb: Require at least libusb-1.0 version 1.0.9.
Merge pull request #107 from uwehermann/libsndfile_fix

libsndfile: Fix satisfy_deb line.
Merge pull request #110 from fewu/gr-specest_bugfix

gr-specest: added dependencies to recipe
Merge pull request #109 from uwehermann/deb_version_and_libav_fix

Fix deb version parsers (and libav package).
Merge pull request #111 from ckuethe/issue_108

Fix insecure tempfile warning
Merge pull request #114 from ckuethe/issue_75

make the app store scrollable