H3sed

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- add hero index page

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- add hero charsheet view
- add recent heroes menu
- add separate toolbar for selected hero
- improve hero parsing regex
- make "movement points in total" read-only, as the game overwrites it on each turn
- save backup only if not already saved for current date
- fix not saving backup before overwriting

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- add undo-redo command history dialog
- add toolbar button to open savefile folder
- add "Show unsaved changes" to edit-menu
- improve hero parsing regex
- improve tracking updates in hero primary attributes from artifact change
- fix army paste retaining previous values in new blank slots
- fix army SpinCtrl hidden arrows becoming visible on system colour change

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- support multiple hero tabs
- show donned artifact stats
- fix using wx locale in Py2

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- first public release