Closes #74, closes #48

 * Moved WBS tree and table to project planning section
 * Wrote introduction to project planning
 * Small edition to texts and changing the order of the tables/figures
#75. Started writing about why we were unable to follow the WBS and Gantt due to unexptected work an challenges. This needs to be filled out, and maybe moved to another section.
Merge branch 'iss48-projectPlanning'