v1.1.0

Added new functions and updated documentation

• dal_len() to retrieve length
• dal_cap() to retrieve capacity
• dal_err() to retrieve error flag
• dal_shift() to shift elements around the array
• dal_getLast() to get the last element (convenience function)
• dal_getr() to allow negative indexing from the back (two's complement machine required!)
• primitive versions of the last two

From this release on, I advise using the new accessor functions instead of accessing the struct contents directly.