Add logo and UML to the readme.

README.md

@@ -1,7 +1,10 @@
-DRAMSys4.0
-===========
+<img src="DRAMSys/docs/images/dramsys4_0.png" width="350" style="float: left;"/>  
 
-**DRAMSys4.0** [1] [2] [3] is a flexible DRAM subsystem design space exploration framework based on SystemC TLM-2.0.
+
+
+
+
+**DRAMSys4.0** is a flexible DRAM subsystem design space exploration framework based on SystemC TLM-2.0.
 
 Pipeline Status: [![pipeline status](https://git.eit.uni-kl.de/ems/astdm/dram.sys/badges/master/pipeline.svg)](https://git.eit.uni-kl.de/ems/astdm/dram.sys/commits/master) 
 [![Coverage report](https://git.eit.uni-kl.de/ems/astdm/dram.sys/badges/master/coverage.svg?job=coverage)](https://git.eit.uni-kl.de/ems/astdm/dram.sys/commits/master)
@@ -18,6 +21,12 @@ Pipeline Status: [![pipeline status](https://git.eit.uni-kl.de/ems/astdm/dram.sy
 - coupling to **DRAMPower** [4] and **3D-ICE** [8] for power and thermal simulation
 - **Trace Analyzer** for visual and metric-based result analysis
 
+## Architecture and Functionality
+
+A UML diagram of the software architecture is presented below; different component implementations are left out for simplicity. More information about the architecture and functionality can be found in the papers [1] [2] [3] and in the introduction video on [Youtube](https://www.youtube.com/watch?v=8EkC3mYWpQY).
+
+<img src="DRAMSys/docs/images/dramsys_uml.png" alt="UML"  />
+
 ## Basic Setup
 
 Start using DRAMSys by cloning the repository.
@@ -134,7 +143,7 @@ Syntax example:
 # [clock-cyle]: [write|read] [hex-address] [hex-data (optional)]
 31:	read	0x400140
 33:	read	0x400160
-56:	write	0x7fff8000 0x123456789abcdef
+56:	write	0x7fff8000 0x123456789abcdef...
 81:	read	0x400180
 ```
 
@@ -149,7 +158,7 @@ Syntax example:
 # [clock-cyle]: [write|read] [hex-address] [hex-data (optional)]
 31:	read	0x400140
 2:	read	0x400160
-23:	write	0x7fff8000 0x123456789abcdef
+23:	write	0x7fff8000 0x123456789abcdef...
 25:	read	0x400180
 ```
 
@@ -184,8 +193,8 @@ The content of [ddr3.json](DRAMSys/library/resources/configs/simulator/ddr3.json
         "ECCControllerMode": "Disabled",
         "UseMalloc": false,
         "AddressOffset": 0,
-        "ErrorCSVFile": "",
         "ErrorChipSeed": 42,
+        "ErrorCSVFile": "",
         "StoreMode": "NoStorage"
     }
 }
@@ -226,9 +235,9 @@ The content of [ddr3.json](DRAMSys/library/resources/configs/simulator/ddr3.json
   - Address offset of the DRAM subsystem (required for the gem5 coupling).
 - *ErrorChipSeed* (unsigned int)
   - Seed to initialize the random error generator.
-  - *ErrorCSVFile* (string)
+- *ErrorCSVFile* (string)
   - CSV file with error injection information.
-  - *StoreMode* (string)
+- *StoreMode* (string)
   - "NoStorage": no storage
   - "Store": store data without error model
   - "ErrorModel": store data with error model [6]