v1.2.2: Bug fix release

This version includes a fix for a crash/memory leak that could happen when memory was (already) exhausted.

It also uses a new directory structure. This should not affect any existing users. However it is now possible to install Dasynq so the main header, dasynq.h, can be included without requiring any additional compiler flags (i.e. by installing it directly in /usr/include). The ancillary headers are now installed into a subdirectory relative to the main header.