Tilde replacement almost working
Add logging for debugging
Fix logging
Merge branch 'tilde' of github.com:Glavin001/MRShell into readline

Conflicts:
	src/mrsh.c
Merge branch 'tilde' of github.com:Glavin001/MRShell into readline
Finish implementation of ~ alias for $HOME.

See https://github.com/Glavin001/MrShell/issues/16#issuecomment-64123560