Borb

:mega: borb release notes

- Added pretty much all the `LayoutElement` implementations to the easy imports.
- Added a `LayoutElement` called `Map` with implementations `MapOfEurope`, `MapOfTheUnitedStates` and `MapOfTheWorld`. These `LayoutElement` instances draw a map of their respective territories, and allow you to mark one or multiple components with a different `fill_color`, `stroke_color` and `line_width`.
- Fixed tests related to unsplash API.
- Added tests for `A4PortraitTemplate`.
- Added tests for `A42ColumnPortraitTemplate`.
- Added tests for `SlideTemplate`.
- Added `TestCreateFullSlideTemplate`. Check out this `TestCase` if you want a concrete example of how to use `SlideTemplate` to produce a beautiful slideshow in PDF.

:mega: borb release notes

- Added some utility methods in `LayoutElement`
- `get_golden_ratio_landscape_box`
- `get_golden_ratio_portrait_box`
- `get_largest_landscape_box`
- `get_smallest_landscape_box`
- Removed `_calculate_min_and_max_layout_box` from `TableCell`
- Added tests for `get_golden_ratio_landscape_box`
- Added tests for `get_golden_ratio_portrait_box`
- Added utility class `A4PortraitTemplate`
- This class represents an `A4_PORTRAIT` `Document`
- It contains methods that allow you to directly add content to it
- All the content-adding methods have sensible defaults (`font`, `font_size`, `font_color`, etc)
- This class has a utility method to immediately `save` the `Document`
- Added tests for `A4PortraitTemplate`
- Fixed small bug in `add_outline` in `Document`

:mega: borb release notes

- fixed bug in `SingleColumnLayoutWithOverflow`
- replaced `list += []` by `list.append()` for performance reasons

:mega: borb release notes

- add `Watermark` `LayoutElement`, representing a piece of text laid out over the entire `Page`. Users can specify the text, font_size, font_color, rotation, and transparency
- add `Watermark` to easy imports
- add tests for `Watermark`
- re-implement `MultiColumnLayout`, with better handling of headers and footers
- update `requirements.txt` where possible
- reworked a couple of tests, ensuring they can run without dependencies as well
- added a **fair use** warning to ensure people know the difference between using `borb` in an open-source vs. commercial setting. This warning is only triggered when producing a high volume of PDF documents.

:mega: borb release notes

This release features the arrival of `RGBA` `Image` objects in `borb`.
There is also a significant speedup in text layout due to a clever width-estimation.

:mega: borb release notes

This release refactors the testing in `borb`.
- All tests have been refactored into directories corresponding the main functionality they test
- E.g. tests for `Equation` (in `borb.pdf.canvas.layout.equation`) can be found in `tests.pdf.canvas.layout.equation`
- Tests derive from `TestCase`
- `TestCase` offers some utility methods to standardize output files
- `TestCase` offers the methods to visually compare an output
- `TestCase` offers the methods to check a PDF using a validator