Cosmetic change to ANOVA model widget

Removed grid lines
Updates to Bayesian Independent Samples T-Test

Added one sided tests
SEM update
cases in SEM removed
Merge pull request #19 from SachaEpskamp/master

Merging SEM updates
Fixes to windows IPC semaphores

They used to consume 100%
Cosmetic fix to the TableView
Remove Bayesian Crosstabs and Regression

Haven’t been implemented yet
Improved variable type changing
Fix to Independent Samples T-Test
Added facility for reading dataset variables as factors