update to handle prediction populations..
combines phenotype and genotype datasets of populations..
selection and combination of training populations...
display GS model output for combined populations..
confirmation page for selected populations...
solgs controllers..
solgs model component..
multifaceted updates..
added flexibility to handle single and combined populations datasets..
handles training and populations..
handles single and combined populations GEBV results..
bug fix: when going back to history page was getting blocked..
Merge branch 'master' into topic/solgs_integration_2
add more tests...
estimate gebvs for prediction pops..
get markers from cached data file instead of db..
lists relevant prediction pops in combined training pops model page..
de minimus..
remove unused columns/options..
undo commit all side effect..