added MANIFEST.md for CGRAN parsing sake

We are currently working on revitalizing CGRAN, the current version is here https://gnuradio.org/cgran/  and just like the old CGRAN it parses OOT's manifest files to get its information.  Feel free to modify stuff, I just copied whatever info I could find.

MANIFEST.md

@@ -0,0 +1,44 @@
+title: gr-gsm
+brief: A GSM receiver
+tags:
+  - GSM
+author:
+  - Piotr Krysik
+copyright_owner:
+  - Piotr Krysik
+dependencies:
+  - gnuradio
+  - gr-osmosdr
+  - scipy
+  - liblog4cpp
+  - libosmocore
+repo: https://github.com/ptrkrysik/gr-gsm.git
+stable_release: HEAD
+icon:
+---
+
+The gr-gsm project is based on the gsm-receiver written by Piotr Krysik (also the main author of gr-gsm) for the Airprobe project.
+
+The aim is to provide set of tools for receiving information transmitted by GSM equipment/devices.
+
+Please see project's wiki https://github.com/ptrkrysik/gr-gsm/wiki for information on installation and usage of gr-gsm.
+
+Short presentation of Airprobe'like application of gr-gsm: https://www.youtube.com/watch?v=Eofnb7zr8QE
+
+Credits:
+
+Piotr Krysik <ptrkrysik (at) gmail.com> - main author and project maintainer
+
+Roman Khassraf <rkhassraf (at) gmail.com> - blocks for demultiplexing and decoding of voice channels, decryption block supporting all ciphers used in GSM, blocks for storing and reading GSM bursts, project planning and user support
+
+Pieter Robyns <pieter.robyns (at) uhasselt.be> - block reversing channel hopping
+
+Thanks:
+
+This work is built upon the efforts made by many people to gather knowledge of GSM.
+
+First very significant effort of public research into GSM and its security vulnerabilities was The Hacker's Choice GSM SCANNER PROJECT. One of the results of this project was creation of a software GSM receiver by Tvoid - gsm-tvoid - which was was the most important predecessor of gr-gsm and of gsm-receiver from the Airprobe project.
+
+Gr-gsm wouldn't be also possible without help and inspiration by Harald Welte, Dieter Spaar and Sylvain Munaut.
+
+Special thanks to Pawel Koszut who generously lent his USRP1 to the author of gr-gsm (Piotr Krysik) in 2007-2010.