WebApplicationRdn improvements

Changed WebApplicationRdn project to use Web API, angular, and twitter bootstrap.

* Code editor is done via codemirror and provides syntax highlighting.
* API Errors and console output (from print) are displayed and styled.
* Any plot commands are rendered as svg output.

I added the RDotNet projects as source projects since I wanted the graphics library, but the NuGet version is built against the very out of date 1.5.5.

Code Editor screenshot:

![editor](https://cloud.githubusercontent.com/assets/181450/3475108/74a42fba-02ec-11e4-9fa5-78f257baacef.png)

#Example 1
x <- (1:10)
y <- runif(10)
print(summary(y))

![output](https://cloud.githubusercontent.com/assets/181450/3475077/2df1e620-02ec-11e4-84c6-6b1155cba35e.png)

#Example 2 #Bug with factor labels.
data(Cars93, package="MASS")
coplot(Horsepower ~ MPG.city | Origin, data=Cars93)

![carplot](https://cloud.githubusercontent.com/assets/181450/3475080/34fd7416-02ec-11e4-9300-94a967777259.png)

#Example 3 #Bug with clipping issues.
library(DAAG)
mf <- lm(log(timef)~log(time), data=nihills)
plot(mf, which=5)

![daagplot](https://cloud.githubusercontent.com/assets/181450/3475086/4030d59e-02ec-11e4-9a4d-4558f8b31b99.png)