Include header template in the documentation?

I've noticed that through all the time that I use wBuild I pretty much use the same code template, including

```R
source('.wBuild/wBuildParser.R')
parseWBHeader("Scripts/SNPplot/Main/calcMean.R")
```

which was not that apparent at the beginning.

Start with .wBuild/wBuildParser.R and the parseWBHeader entry point shown in the issue, then locate the existing wBuild documentation. Document the recurring source and parseWBHeader template, including the example path, so users can find the basic header workflow without prior familiarity.

Written by the indexing model from the issue text.