Add skeleton of new plugin
Add widget with grid
Add status for cells
Add labels and zoom for cell
Add correlation support
Add gradient for cells
Refactoring
Several small fixes
Add parameters for customization
Add Spearman correlation
Now plugin remember previous table of correlations
Optimize calculation of coefficients
Now Pearson correlation calculated in separate thread
Now Spearman correlation calculated in separate thread
Fix for calculation of correlation different methods at the same time
Some small optimizations and improvements
Return ability to zoom cell under cursor
Add ability to choose colors
Fix wrong color for correlation = -1
Add saving to file
Fix problem with stranger empty row
Codestyle fixes
Add ability to view correlation coefficient for each cell
Fix incorrect completion threads when the program exits