added book link

03 Lab 2 Software Architecture.md

@@ -4,6 +4,7 @@
 Supporting resources:
 
 1. [Lecture slides](https://drive.google.com/open?id=1Ux83hzw-DdcBWn6PUXz_xF3b-ytE4PsWLpSKS_dqBfw)
+2. [Building on Multimodal Databases](http://info.marklogic.com/rs/371-XVQ-609/images/building-on-multi-model-databases.pdf)
 
 At this stage you have carried out Domain-Driven Design and now have a good idea about the system you are required to develop.
 
@@ -25,4 +26,4 @@ In this lab you will be applying the knowledge from this week's lecture to the p
     3. Configure your git details in each repository.
     4. Set up a suitable `.gitignore` file.
 
-Once everything is set up you are free to start developing your system. Over the next few weeks you will be introduced to a number of additional skills and techniques that you will be expected to apply to your project.
+Once everything is set up you are free to start developing your system. Over the next few weeks you will be introduced to a number of additional skills and techniques that you will be expected to apply to your project.