Implemented json converter library.
Generalized the csv2base class to ensure an easier file conversion.
Modified the json libraries and adapt it to the modified csv2base class.
Changed the file extension for the created json file from .json to .js
Modified the existing tests to prevent the test failure which depends on a wrong expected output.
Wrote test for the json library.
Merge remote-tracking branch 'remotes/upstream/develop' into feature/generalize_converting_add_json


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Added encoding to the values of the csv columns to prevent encoding problems.
add worksheet index parameter to csv2json command
change args parameter from symbol to string
Merge pull request #1 from gernotlabahn/feature/generalize_converting_add_json

Feature/generalize converting add json
Merge pull request #11 from Neoklosch/feature/generalize_converting_add_json

Feature/generalize converting add json
@Neoklosch @gernotlabahn Merging to develop in order to restructure all this together