Add README and example R code.

README.md

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+# DC_theme_generator : a theme generator for ggplot2
+
+
+
+```ggplot2``` is a fantastic package made available by the great people over at [tidyverse](https://ggplot2.tidyverse.org/). ```ggplot2``` is great for designing plots layer by layer in R. Although ```ggplot2``` provides theming capabilities, the default choices available through the package can seem mundane and unapplealing for making publication quality figures.
+
+See these examples:![animation](img/animation.gif)
+
+
+
+I found myself writing these ```ggplot2::theme()``` objects everytime I wanted to plot something. So I wrote an R function that allows me to customize some key aspects of ```ggplot2::theme()``` and have a bit more granular control over the aesthetics of the "canvas" of my plots so to speak.
+
+```DC_theme_generator``` has handpicked defaults that make a plot look beautiful right out of the box.
+
+## Using DC_theme_generator
+
+```R
+source("https://gitlab.utu.fi/deecha/ggplot_themes/-/raw/master/DC_theme_generator.R")
+
+customtheme <- DC_theme_generator(type='L')
+ggplot()+geom_point()+customtheme
+```
+
+More detailed usage instructions along with an example can be found in the R script ```source.R``` in this repo.
+
+Here is an example tweaking some of the defaults:
+
+```R
+source("https://gitlab.utu.fi/deecha/ggplot_themes/-/raw/master/DC_theme_generator.R")
+customtheme <- DC_theme_generator(type = 'L',
+                                  legend = 'F',
+                                  ticks = 'out',
+                                  x.axis.angle = 45,
+                                  hjust = 0.5,
+                                  vjust = 0.5,
+                                  fontsize.cex = 1.8,
+                                  fontfamily = 'mono')
+
+ggplot(data = dat, aes(x=X, y=Y, color=Class)) + geom_point() + scale_color_manual(values=c("red","blue")) + xlab("X-axis") + ylab("Y-axis") + ggtitle("Customized DC_theme_generator") + customtheme
+```
+