message: add decription to install the cross-compiler via as packet
diff: # HermitCore - A lightweight unikernel for a scalable and predictable runtime behavior
  -The project [HermitCore](http://www.hermitcore.org) is new [unikernel](http://unikernel.org) targeting at high-performance computing.
  +The project [HermitCore](http://www.hermitcore.org) is new [unikernel](http://unikernel.org) targeting a scalable and predictable runtime for high-performance computing and cloud computing.
  HermitCore extends the multi-kernel approach (like [McKernel](http://www-sys-aics.riken.jp/ResearchTopics/os/mckernel.html)) with unikernel features for a better programmability and scalability for hierarchical systems.
  On the startup of HermitCore applications, cores are isolated from the Linux system enabling the bare-metal of the applications on these cores.
  This approach achieves lower OS jitter and a better scalability compared to full-weight kernels.
  Inter-kernel communication between HermitCore applications and the Linux system is realized by means of an IP interface.
  In addition to the multi-kernel approach described above, HermitCore can be used as classical standalone unikernel as well.
  -This reduces the demand on resources and improves the boot time.
  +In this case HermitCore run a single-kernel exklusive on the hardware or within a virtual machine.
  +This reduces the demand on resources and improves the boot time, which is an excellent behavior for cloud computing.
  It is the result of a research project at RWTH Aachen University and is currently an experimental approach, i.e., not production ready.
  Please use it with caution.
  @@ -26,6 +27,19 @@ On Debian-based systems the packets can be installed by executing:
  sudo apt-get install qemu-system-x86 nasm texinfo libmpfr-dev libmpc-dev libgmp-dev libisl-dev flex bison
  ```
  +## Installing HermitCore with help of debian packets
  +
  +We provide binary packets for Debian-based systems, which contains the whole HermitCore toolchain including a cross-compiler.
  +To install the debian packets with following commands:
  +```
  +echo "deb [trusted=yes] https://dl.bintray.com/rwth-os/hermitcore vivid main" | sudo tee -a /etc/apt/sources.list
  +sudo apt-get -qq update
  +sudo apt-get install binutils-hermit newlib-hermit pthread-embedded-hermit gcc-hermit libhermit
  +```
  +This toolchain is able to build applications to run within VM as [classical unikernel](building-and-testing-hermitcore-as-classical-standalone-unikernel) or bare-metal in a multi-kernel environment.
  +For the multi-kernel environment, install the a modified Linux kernel.
  +An introduction is published in section [Building and testing HermitCore as multi-kernel on a real machine](building-and-testing-hermitcore-as-multi-kernel-on a-real-machine).
  +
  ## Building and testing HermitCore as multi-kernel within a virtual machine
  1. Please make sure that you cloned this repository and all its submodules.
  