Added sheetname_only parameter back in
refactored Workbook.current() and renamed into Workbook.active()
added more tests
fixed chart tests on mac
renamed Workbook.active() back into current() so it doens't get confused with the ActiveWorkbook in VBA that refers to the active Window
moved xl_workbook_latest to platform modules
fixed tests
implemented Sheet class on mac
added Sheeet.name/index on windows and readded get_app() that was unintentionally deleted
missing brackets in autofit()
Merge branch 'develop' of https://github.com/ZoomerAnalytics/xlwings into develop
added Workbook.set_current() method
added file name only info to Workbook docstring
first step in refactoring the object model away from wb.range(...) to Range(..., workbook=wb)
corrected docstring for Workbook
Changed Chart.add() into classmethod, updated a few docstrings
added docs for Sheet class
closing the workbook after creating it in the tests
changed back to xl_workbook_latest to avoid zombie EXCEL processes on Windows
missing to adopt _get_app() for  xl_workbook_latest change