Actually corr.test is even better than corr.model.
Use of 'corr.sim' instead of 'sigma' in GUI.
Options for saving config files.
Roxygenize.
Load example graph in Eclipse for faster development/testing.
Revert "Removing unused Class."

This reverts commit fda1ea8985d2c74bcbbfd5af8530babd88abd23e.
Options for config files move from PowerDialog to super class PDialog.
Removed buttons and code to change the correlation matrix used for testing.
Removed unnecessary gMCP::: prefixes.
Documented `...` for backward compatibility.
Introduced parameter `na.allowed` to function `checkCorrelation`.
Fixed backward compatibility for `sigma` and `cr`.