Merge branch 'master' of https://github.com/prasopes/DTU-course-mining
fix one single line suggested by Vladimir
Merge branch 'master' of https://github.com/prasopes/DTU-course-mining

Conflicts:
	dataanalysis/cal_avg.py
Merge branch 'master' of https://github.com/prasopes/DTU-course-mining
Merge branch 'master' of https://github.com/prasopes/DTU-course-mining
Merge branch 'master' of https://github.com/prasopes/DTU-course-mining
added plotting module for time series data
quick update of cal_avg.py
Merge branch 'master' of https://github.com/prasopes/DTU-course-mining
Added courses.json from a full 40 minutes scraping
Added PyHamcrest dependency. Fixed CourseSpider test after lifting the department scraping restrictions.
Added test for issue #3.
Added ScaleCorrector to fix issue #3. Passes test.