solve question in exercises
make plotting function for output to device
setup for debugging chapter
starting debug chapter
debug chapter, didn't do remaining exercises
Merge remote-tracking branch 'upstream/master'

Conflicts:
	02_Subsetting/Subsetting-Alathea.Rmd
	02_Subsetting/Subsetting-Alathea.html
	02_Subsetting/Subsetting-Alathea.md
	02_Subsetting/Subsetting-Andrew.Rmd
	02_Subsetting/Subsetting-Andrew.html
	02_Subsetting/Subsetting-Jenny.Rmd
	02_Subsetting/Subsetting-Jenny.html
	02_Subsetting/Subsetting-Jenny.md
	02_Subsetting/Subsetting_Susannah.Rmd
Environments, sorry so late
Davor's solutions for 'Debugging and Exceptions'
debugging

Merge remote-tracking branch 'upstream/master'

Conflicts:
	02_Subsetting/Subsetting-Alathea.Rmd
	02_Subsetting/Subsetting-Alathea.html
	02_Subsetting/Subsetting-Alathea.md
	02_Subsetting/Subsetting-Andrew.Rmd
	02_Subsetting/Subsetting-Andrew.html
	02_Subsetting/Subsetting-Jenny.Rmd
	02_Subsetting/Subsetting-Jenny.html
	02_Subsetting/Subsetting-Jenny.md
	02_Subsetting/Subsetting_Susannah.Rmd
Merge pull request #33 from cubranic/05-davor

Davor's solutions for 'Debugging and Exceptions'
Merge pull request #32 from meligu8/master

environments
Merge pull request #31 from kjgilbert/master

Set up for debugging chapter, also going to try OO chapter on my own