Add QtCreator files

This adds

* a script that runs qmake and then patches includes/defines/QT-vars
* a code style script that helps following our coding conventions

data/ide/qt-creator/code-style.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE QtCreatorCodeStyle>
+<!-- Written by QtCreator 4.8.2, 2019-04-27T23:08:23. -->
+<qtcreator>
+ <data>
+  <variable>CodeStyleData</variable>
+  <valuemap type="QVariantMap">
+   <value type="bool" key="AlignAssignments">false</value>
+   <value type="bool" key="AutoSpacesForTabs">false</value>
+   <value type="bool" key="BindStarToIdentifier">true</value>
+   <value type="bool" key="BindStarToLeftSpecifier">false</value>
+   <value type="bool" key="BindStarToRightSpecifier">false</value>
+   <value type="bool" key="BindStarToTypeName">false</value>
+   <value type="bool" key="ExtraPaddingForConditionsIfConfusingAlign">true</value>
+   <value type="bool" key="IndentAccessSpecifiers">false</value>
+   <value type="bool" key="IndentBlockBody">true</value>
+   <value type="bool" key="IndentBlockBraces">true</value>
+   <value type="bool" key="IndentBlocksRelativeToSwitchLabels">true</value>
+   <value type="bool" key="IndentClassBraces">false</value>
+   <value type="bool" key="IndentControlFlowRelativeToSwitchLabels">true</value>
+   <value type="bool" key="IndentDeclarationsRelativeToAccessSpecifiers">true</value>
+   <value type="bool" key="IndentEnumBraces">false</value>
+   <value type="bool" key="IndentFunctionBody">true</value>
+   <value type="bool" key="IndentFunctionBraces">false</value>
+   <value type="bool" key="IndentNamespaceBody">true</value>
+   <value type="bool" key="IndentNamespaceBraces">false</value>
+   <value type="int" key="IndentSize">4</value>
+   <value type="bool" key="IndentStatementsRelativeToSwitchLabels">true</value>
+   <value type="bool" key="IndentSwitchLabels">true</value>
+   <value type="int" key="PaddingMode">2</value>
+   <value type="bool" key="ShortGetterName">true</value>
+   <value type="bool" key="SpacesForTabs">false</value>
+   <value type="int" key="TabSize">4</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>DisplayName</variable>
+  <value type="QString">LMMS</value>
+ </data>
+</qtcreator>

data/ide/qt-creator/setup

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+die()
+{
+	echo "$@"
+	exit 1
+}
+
+main()
+{
+	[ "${BASH_SOURCE[0]}" ] || die "Variable BASH_SOURCE missing"
+	command -v dirname >/dev/null || die "Function 'dirname' missing"
+	command -v qmake >/dev/null || die "Mising command or alias 'qmake'"
+	local cwd
+	cwd="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+	[ "$cwd" ] || die "Could not find current working dir"
+	cd "$cwd/../../../" || die "Could not change directory"
+
+
+	local builddir=$1
+	[ -d "$builddir" ] || die "Please specify a build directory for 1st arg"
+
+	local settings=()
+	settings+=('QT += core gui widgets xml')
+	settings+=('INCLUDEPATH += include')
+	settings+=("INCLUDEPATH += $builddir $builddir/src")
+	settings+=("DEFINES += LMMS_EXPORT=")
+
+	[ -d /usr/include/lilv-0 ] && settings+=('INCLUDEPATH += /usr/include/lilv-0')
+
+	local basename=$(basename $PWD)
+	[ "$basename" ] || die "Can't get basename of $PWD"
+	local profile=$(basename $PWD).pro
+	qmake -project "${settings[@]}" -o $(basename $PWD).pro || die "qmake failure"
+
+	echo "Created $profile"
+	echo "If you have not already, import code style "
+}
+
+main "$@"