relax SVN archive

Added the 'pipe' argument to generic_fns.mol_res_spin.return_spin_from_id().

This is to mimic the return_spin() function.

Fix for the gui.misc.bitmap_setup() function for Mac OS X - all bitmaps with alpha had black backgrounds!

Fix for return_residue() for a bug introduced at r16910.

Created generic_fns.mol_res_spin.return_spin_from_id() for returning spin containers from spin IDs.

generic_fns.mol_res_spin.create_pseudo_spin() is now adding data to the spin ID look up table.

To support this, the return_residue() method now takes the 'indices' argument and returns the
molecule and residue indices.

Started to fill up the spin ID look up table.

The index_molecule() and index_residue() functions have been added to determine the MoleculeList and
ResidueList indices of given molecules and residues. These are used by the create_spin for
efficiency and to allow the indices (together with the spin index and spin ID string) to be
assembled into the look up table. This table is not used anywhere yet.

Initialised a look up table in the cdp.mol structure for faster spin access.

This look up table will be slowly transitioned to, and should significantly speed up certain
operations.

Created the gui.misc.bitmap_setup() function for handling bitmap alpha correctly on operating systems.

This function is required to handle alpha in bitmap on MS Windows so that regions with partial
transparency are not blended into the default dark grey colour of Windows' windows.

Added the status/weather-snow-scattered-night Oxygen icon as a wizard graphic for the temperature uf.

The about model-free dialog no longer has grey at the bottom in MS Windows.

The wx.ScrolledWindow.GetScrollPixelsPerUnit() function is now used to determine how many pixels the
y scrolling is, and rounds up the virtual size based on that.