Setting start_directory is being used as the way to make startdirs work open correctly. Find a new way to make this work in >1.8 or reset / flush start_dirs accordingly.
#35 expanduser of start_directory. tmuxp 1.9-dev doesn't expand ~.
As of 0ca8e33 subsequent panes in new windows are not getting the correct path.
Also this needs a test.
split_window now allows -c for start directory. #35
This is fixed. #35