Reformatted INSTALL.md

[AutomateAaron]

Updated INSTALL.md to make use of GitHub's code blocks to make it easier to understand.

For example, changed this instruction:

---

• Change directory to the folder where caffe source code is placed.
• sudo apt-get install libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev protobuf-compiler
• sudo apt-get install --no-install-recommends libboost-all-dev
• sudo apt-get install libgflags-dev libgoogle-glog-dev liblmdb-dev

• sudo apt-get install libturbojpeg

to this instruction:

---

• Change directory to the folder where caffe source code is placed.

  sudo apt-get install libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev protobuf-compiler
  sudo apt-get install --no-install-recommends libboost-all-dev
  sudo apt-get install libgflags-dev libgoogle-glog-dev liblmdb-dev
  sudo apt-get install libturbojpeg

  ---

  No changes were made besides formatting, the content should all be the same.

[mathmanu]

Thanks.