updated readmes and added linux build scripts

linux/install.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+PREFIX=/usr/local
+
+if [ -n "$1" ] ; then
+  PREFIX="$1"
+fi
+
+echo "Installing PaulXStretch to ${PREFIX} ... (specify destination as command line argument if you want it elsewhere)"
+
+BUILDDIR=../build/PaulXStretch_artefacts/Release
+
+mkdir -p ${PREFIX}/bin
+if ! cp ${BUILDDIR}/Standalone/paulxstretch  ${PREFIX}/bin/paulxstretch ; then
+  echo
+  echo "Looks like you need to run this as 'sudo $0'"
+  exit 2
+fi
+
+mkdir -p ${PREFIX}/share/applications
+cp paulxstretch.desktop ${PREFIX}/share/applications/paulxstretch.desktop
+chmod +x ${PREFIX}/share/applications/paulxstretch.desktop
+
+mkdir -p ${PREFIX}/share/pixmaps
+cp ../images/paulxstretch_logo@2x.png ${PREFIX}/share/pixmaps/paulxstretch.png
+
+if [ -d ${BUILDDIR}/VST3/PaulXStretch.vst3 ] ; then
+  mkdir -p ${PREFIX}/lib/vst3
+  cp -a ${BUILDDIR}/VST3/PaulXStretch.vst3 ${PREFIX}/lib/vst3/
+
+  echo "PaulXStretch VST3 plugin installed"
+fi
+
+
+echo "PaulXStretch application installed"
+