v1.2-r7

- Gain files in ANTAB format.
- Proper handling (by interpolation) of flagged gains.

v1.2-r8

- changes for cleaner compilation
- adjustments to task_polconvert.py for shape variations in cal tables

v1.2-r9

- Corrected bug in CalTable.
- Automatic selection of spw (if spw is set to <0 ).

v1.2-r10

- Several IFs can be plotted at once.
- Added plot of amplitude vs. IF number.
- Added "self" interpolation (useful for amplitude solutions).
- Plots and diagnostic files are now saved in directories.

v1.2-r11
- Added XYratio
- Added ability to drop XY phase solution

v1.2-r12
- Plots are generated in off-line mode.

v1.2-r13
- Modified for CASA 4.7

TODO: 

- Fitting of XY-phase with a simple delay model (per subband).