Updated readme.md

README.md

+White Rabbit Timing Receiver in PMC format
+=
+
+How to check out and synthesize the PMC gate ware
+==
+
+On Linux:
+
+<pre>
+mkdir pmc
+cd pmc/
+git clone https://github.com/stefanrauch/bel_projects.git --recursive
+cd bel_projects/
+git checkout pmc
+git submodule init
+git submodule update
+git submodule update --recursive
+
+Optional: make pmc
+Optional: Open project file bel_projects/syn/gsi_pmc/control/pci_pmc.qpf
+with Quartus
+</pre>
+
+Be aware that you need a Quartus 64-bit version to synthesize the design.