Check if unit is attached to context
Fix sample period
Implement repeat mode `BK_PALINDROME`
Do not reset arpeggio when setting new note

Instead, reset it only when note was released before
Fix FFT test
Add general lock flag
Remove makefiles not relevant for build
Add configure options
Fix deprecated warnings
Add some tests
Update file check
Update tests
Update header includes
Update .gitignore
Empty uninitialized memory
Fix build analyzer errors
Add missing object field
Update code formatting
Add POSIX macro
Bump version to 0.11.2