Move parts to BUILDING.md

[ci skip]

README.md

@@ -14,34 +14,7 @@ __This may not be fully working yet.__ Use with care, run with maximum verbosity
 
 ## Installation
 
-* If you believe in dogfeeding, download __linuxdeployqt-x86_64.AppImage__ from the [Releases](https://github.com/probonopd/linuxdeployqt/releases) page and `chmod a+x` it. Then you can skip the following steps because it is a self-contained bundle of linuxdeployqt (made with linuxdeployqt of course)
+Please download __linuxdeployqt-x86_64.AppImage__ from the [Releases](https://github.com/probonopd/linuxdeployqt/releases) page and `chmod a+x` it. If you would like to build `linuxdeployqt` from source instead, see [BUILDING.md](https://github.com/probonopd/linuxdeployqt/blob/master/BUILDING.md).
-
-* Get and build linuxdeployqt e.g., using Qt 5.7.0 (you could use this [Qt Creator AppImage](https://bintray.com/probono/AppImages/QtCreator#files) for this)
-
-```
-sudo apt-get -y install git g++ libgl1-mesa-dev
-git clone https://github.com/probonopd/linuxdeployqt.git
-# Then build in Qt Creator, or use
-export PATH=/tmp/.mount_QtCreator-*-x86_64/5.7/gcc_64/bin/:$PATH
-cd linuxdeployqt
-qmake linuxdeployqt.pro
-make
-```
-
-* Build and install [patchelf](https://nixos.org/patchelf.html) (a small utility to modify the dynamic linker and RPATH of ELF executables; similar to `install_name_tool` on macOS). To learn more about this, see http://blog.qt.io/blog/2011/10/28/rpath-and-runpath/
-
-```
-wget https://nixos.org/releases/patchelf/patchelf-0.9/patchelf-0.9.tar.bz2
-tar xf patchelf-0.9.tar.bz2
-( cd patchelf-0.9/ && ./configure  && make && sudo make install )
-```
-
-* Optional if you want to generate AppImages: Download [appimagetool](https://github.com/probonopd/AppImageKit/releases) and put it into your $PATH, e.g., into `/usr/local/bin`. Make sure it is renamed to `appimagetool` and is `chmod a+x`
-
-```
-sudo wget -c "https://github.com/probonopd/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage" -O /usr/local/bin/appimagetool
-sudo chmod a+x /usr/local/bin/appimagetool
-```
 
 ## Usage