Update 00-intro.Rmd

Added some information on:
- using RStudio as a presentation tool;
- dependency management for reproducible research with r

episodes/00-intro.Rmd

@@ -42,11 +42,17 @@ popular IDE (Integrated Development Environment) for R. An IDE is a piece of
 software that provides
 tools to make programming easier.
 
+You can also use the R Presentations feature to present your work in an HTML5
+presentation mixing Markdown and R code. You can display these within R Studio 
+or your browser. There are many options for customising your presentation slides, 
+including an option for showing LaTeX equations. This can help you collaborate
+with others and also has an application in teaching and classroom use.
+
 ## Why learn R?
 
 ### R does not involve lots of pointing and clicking, and that's a good thing
 
-The learning curve might be steeper than with other software, but with R, the
+The learning curve might be steeper than with other software but with R, the
 results of your analysis do not rely on remembering a succession of pointing
 and clicking, but instead on a series of written commands, and that's a good
 thing! So, if you want to redo your analysis because you collected more data,
@@ -72,6 +78,16 @@ statistical tests in your manuscript are updated automatically.
 An increasing number of journals and funding agencies expect analyses to be
 reproducible, so knowing R will give you an edge with these requirements.
 
+To further support reproducibility and transparency, there are also packages
+that help you with dependency management: keeping track of which packages we
+are loading and how they depend on the package version you are using. 
+This helps you make sure existing workflows work consistently and continue
+doing what they did before. 
+
+Packages like renv let you “save” and “load” the state of your project library,
+also keeping track of the package version you use and the source it can be 
+retrieved from.
+
 ### R is interdisciplinary and extensible
 
 With 10,000+ packages that can be installed to extend its capabilities, R