Fixes for file paths and newline

Should improve compatibility for other operating systems.
Scans both save slots upon load for better keys. Closes #8.
Changes IV box layout as described in #6.
Added UI for gender filters. Made IV modifiers more obvious.
Added CheckedComboBox. Added nature filters (UI only).
Fixed the nature selection.
Before visual overhaul.
Improved filtering layout.
Implement filters.
Add ability filter. Fix some interface issues.
Merge branch 'use-other-slot-for-break'