Some latest corrections to the experimental (8 TeV) xsection scripts

- .pydevproject removed from index, it's unique for everyone (back it up if you have it!)
- #20 bug fixed in experimental/getFitResults_2012.py
- plotting fit results as well as templates
- plotting systematic uncertainties together with fit/statistical errors on main result plots
- calculateTotalUncertainty, getRelativeError, symmetriseErrors functions moved to tools/Calculation.py (used by plotting and printing scripts)
- minor corrections