chore(app): extracts line-scatter chart into own module, refactors graphs and model modules to prevent code to be repeated
feat(line-scatter-area-chart): introduces directive and example of combined line scatter area chart
Merge pull request #15 from StarterSquad/feature/81-combined-line-area-scatter-chart

feat(line-scatter-area-chart): introduces directive and example of combi...
(chore):added *.pyc files to gitignore and removed them from working tree
added a method to upload Excel or text file
Merge pull request #17 from StarterSquad/feature/89-upload-excel-file

added a method to upload Excel or text file
created new branch for backend
added files to repository
deleted compiled python files
removed GODDAMN redundant code
updated data sheets, changed code to read in new datasheets