Support for MIMO / dual RX streams from BladeRF (#26)

- Replace existing Doxygen file in the root folder
- Add workflows folder to the existing .github folder

* Rel-9 / Mixed Mode baseline support

* Update .gitmodules

Changed repo name and URI to srsRAN

* removed old subodule path

* New path for submodule

* Pass MCH idx through RLC to allow correct assignment of detected MCast addresses in gw

* Rebased changes for rt-mbms-modem from srsLTE to srsRAN. Added spldlog as include-only to avoid a conflict with srsRAN's included libfmt.

* Update README.md

Remove dependency on system libspdlog

* Support for MIMO / multiple RX channels. Also replaces the MMAPping ringbuffer implementation so that valgrind can now be used again.

* Added new parameter for RX channel count, disabled measurement file creation and GPS integration in the default config file.

CMakeLists.txt

@@ -47,7 +47,7 @@ set(CMAKE_CXX_CLANG_TIDY clang-tidy --format-style=google --checks=clang-diagnos
 
 add_executable(modem src/main.cpp src/SdrReader.cpp src/Phy.cpp
   src/CasFrameProcessor.cpp src/MbsfnFrameProcessor.cpp src/Rrc.cpp
-    src/Gw.cpp src/RestHandler.cpp src/MeasurementFileWriter.cpp)
+  src/Gw.cpp src/RestHandler.cpp src/MeasurementFileWriter.cpp src/MultichannelRingbuffer.cpp)
 
 target_link_libraries( modem
     LINK_PUBLIC
@@ -63,9 +63,6 @@ target_link_libraries( modem
     ssl
     crypto
     SoapySDR
-
-    debug
-    lsan
 )