2. standardise all callback names to be x,y,z etc. if they have multiple words.
3. add cal to get the region viewed
4. test photocams signals and new call
SVN revision: 43069
this is a patch for the elm_image so far.
After some valgrind work and with the help of Gustavo, the orient code
for the image is not leak free (according to valgrind). According to
k-s, this way of doing things would avoid any nasty caching errors I've
been getting though valgrind before.
SVN revision: 40314