msPCA 0.2.0

• Added support for no-correlation constraints between PCs as well as orthogonality constraints. User chooses between orthogonality and uncorrelatedness constraints via the feasibilityConstraintType parameter to msPCA().
• Renamed return field from orthogonality_violation to feasibility_violation to support both constraint types.
• Renamed function feasibility_violation() as orthogonality_violation() to be more explicit
• Created function pairwise_correlation()
• Added warning message when no feasible solution is found

msPCA 0.1.0

• Initial CRAN release