Solar Power Project SVN

Calculate button now appends to text area instead of setting it to new results. Facilitates the comparisons of systems sort of.

Added clear button, to clear results

Added scroll bar to results bar.

Added city location. Once selected, the latitude is set accordingly. Yet to add in average cloud cover, cost and tariff functionality (if I ever find appropriate values lol).

Haven't added any roof title/bracing functionality yet.