Gantt-project-maker

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- Improved code and added some more tests

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- Added new Excel format output to collect all the projects per contributor
- Added possibility to assign number of hours to each contributor's task
- Added summations of hours per contributor

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- Added option --suffix in order add a extra suffix to the filename
- Added option --project in order to filter on the main projects which are going to be included
- Added replacement variable for both titles and date/time. Now a variable 'my_variable'
can be defined which replaces all occurrences of {{ my_variable }}

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- Added option --vacations in order to export a gantt chart of the vacations per employer
- Added option --collaps_tasks in order to collaps the tasks per project to one task in order to simplify the output
- Improved some feedback at errors with missing employees
- if --output_filename is given on the command line, do not add employees to the base
- bug fix on quarter label in excel output
- bug fix on pdf output of resources

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- Added --pdf option in order to convert svg file into pdf as well

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- Added possibility to add margin_left and margin_right property to project to prevent cluttering of labels
- Added possibility to filter on one or more employees to only display the project of the selected employees
- Change default font size for level 0 and 1 in project plan
- Add name of employee to title if a filter was used