Build dependencies are broken for Debian package#13

These need fixing; currently the package [fails to build on Launchpad](https://launchpad.net/~thirtythreeforty/+archive/ubuntu/bullycpp/+build/7843885). ``` dpkg-buildpackage ───────────────── dpkg-buildpackage: source package bullycpp dpkg-buildpackage: source version 0.8.2-1 dpkg-buildpackage: source distribution vivid dpkg-source --before-build bullycpp-0.8.2 dpkg-buildpackage: host architecture amd64 fakeroot debian/rules clean dh clean --sourcedirectory=src/ dh_testdir -O--sourcedirectory=src/ dh_auto_clean -O--sourcedirectory=src/ dh_clean -O--sourcedirectory=src/ debian/rules build dh build --sourcedirectory=src/ dh_testdir -O--sourcedirectory=src/ dh_auto_configure -O--sourcedirectory=src/ qmake: could not find a Qt installation of '' dh_auto_configure: qmake -makefile -nocache QMAKE_CFLAGS_RELEASE=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 QMAKE_CFLAGS_DEBUG=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 QMAKE_CXXFLAGS_RELEASE=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 QMAKE_CXXFLAGS_DEBUG=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 QMAKE_LFLAGS_RELEASE=-Wl,-Bsymbolic-functions -Wl,-z,relro QMAKE_LFLAGS_DEBUG=-Wl,-Bsymbolic-functions -Wl,-z,relro QMAKE_STRIP=: PREFIX=/usr returned exit code 1 debian/rules:3: recipe for target 'build' failed make: *** [build] Error 2 dpkg-buildpackage: error: debian/rules build gave error exit status 2 ``` I believe the issue is that `qtchooser` is not installed. I thought Windows packaging was a pain...