Console-menu

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- Add feature to hide borders for menu items.
- Add feature to return to previous menu.
- Add printf and println functions to prompt_utils.

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- Add prompt_utils class.
- Add feature to show borders above or below menu items.
- Fix unit tests to run on windows.
- Add new borders for heavy outer/light inner; and double-line outer/light inner.

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- Add new multi-select menu feature.
- Use editable flag for installing project.
- Clean up imports.
- Expanded unit tests.
- Change doc theme to sphinx_rtd_theme.

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- Add Python 2.7, 3.5, and 3.6 to build matrix.
- Remove Python 2.6, 3.3, 3.4.
- PEP8 cleanup.
- Add pycodestyle to build process.
- Expanded unit tests.
- Add updated screenshots for Readme.
- Enhance text section to allow multi-line wrapping.
- Expand examples to show more features.
- Fix bug in heavy borders showing incorrect characters.
- Add optional bottom border to header section.
- Add prologue and epilogue sections to menus.
- Add methods for setting the border style factory and style type.
- Add border style type enumeration and factory.
- Change default padding for left and right to 2.
- Add new double-line border and rename border styles for consistency.
- Change default prompt.
- Update screen input method for python2 & 3 compatibility
- Remove deprecated methods
- Change sphinx theme and fix errors in rst files.
- Fix warnings/errors uncovered by pytest.
- Add unicode heavy border style.
- Add menu formatter class and related changes.
- Remove curses dependency.
- Initial commit of project, forked from curses-menu.