Things to do / fix in the ohana release

1- error handling in FITS (fits_error_message)

2- ohana PS overlay needs to be cleaned

3- kii needs to handle ieee errors in the image without crshing

4- check for kii errors if there is no image displayed

5- loops in mana 

6- better mana image math?  (parse expressions into RPN)

7- mana logical image assignments

8- mana: function to read a line from file into a variable

9- variables from the image header

10- more than 1 mana at a time