Adding documents for OpenBTS:
OpenBTS_Guide_En_v0.1.pdf - OpenBTS Installation and Configuration Guidev0.1 (2009-05-25)
fordummies.pdf OpenBTS for dummies, January 10, 2013
fvdbroekscriptie.pdf - Catching and Understanding GSM-Signals
Manual de instalación de OpenBTS Versión 0.2.pdf - 15.09.2011