Work in our development method:

 * Created subsections in the section about our development method
 * Wrote introduction about why we chose RUP as our development method
 * Started editing some the content about RUP
Further work on development method

 * Finished section about development method. Made some changes to the existing text, and added more.
 * Moved section about Project planning to the bottom of the chapter.
Closes #49. Wrote introduction to the section about risk analysis. Further work might be needed.