Multi-vector-simulator

Added
- tests for the A0 module (87)
- badge for coveralls.io (90)
- tests for the parsing of arguments (97)
- exceptions for missing input file/folder (98)
Changed
- removed unused class structure in all modules, execution stay the same (86)
- link to build for this repository instead of previous one (95)
- use argparser to parse the arguments from command line (97)
- the full path of input folder containing csv is now required (98)
Removed
- argument parsing using sys.argv (97)

Added
- LICENSE.md with GPL v2.0 (38, smartie2076)
- folder "docs" and content to generate readthedocs (39, smartie2076)
- Started readthedocs homepage (not working): https://readthedocs.org/projects/mvs-eland/ (#39, smartie2076, 57, Bachibouzouk)
- new feature to create the input json file from a collection of csv files (Piranias)
- new module added: A1_csv_to_json.py (Piranias)
- Badges for build and docs (70, Bachibouzouk)
- Setup file (72, Bachibouzouk)
- Parameters can now be a list of values, eg. efficiencies for two busses or multiple input/output vectors (52, marc-juanpera)
- Parameters can now be a timeseries (eg. efficiency of a converter, electricity prices) (37, 82, marc-juanpera)
- Parameters can now be defined as a list as well as as a timeseries (52,82, marc-juanpera)

Changed
- requirements.txt only includes packages needed for users of MVS (39, smartie2076)
- test_requirements.txt includes packages used by developers of MVS (39, smartie2076)
- CONTRIBUTING: Now with read the docs (smartie2076)
- README: Now with contextualization of MVS, setup & installation, utilization of and contributing to MVS (47, smartie2076)
- directory structure of input/ (49 Piranias)
- json data structure reduced to 2 (main) levels: goup and asset (49 smartie2076)
- logging now stores into appropriate logfile (smartie2076)
- change code_folder to src (80)

Removed
- Output files excluded from repro (smartie2076)

Added
- Introduced test for correct code formatting (blacks, closed issue 31, 18)
- Now unlimited number of busses possible
- Now with monthly peak demand pricing
- Two test json files
- Files to create wiki page "Exemplary Workflow"

Changed
- Introduced new code structure (folder "code") and updated relative import paths (closed 17)
- Introduced (basic) plots of optimized capacities and costs (addresses issue 29)
- CONTRIBUTING
- CHANGELOG
- Tests and travis file
- requirements.txt

Removed
- Excel input file
- Python files to read from excel

Added
- CONTRIBUTING (8)
- CHANGELOG (8)
- Tests (8, 10)

Changed
- relative imports (10)
- moved `mvs_eland_tool`'s content in a function (10)

Removed
- yet another thing