Data Handler Refactor, bias and exo algorithm update, other misc changes

What’s Changed

• Gb/bias nc (#181) @grantbuster
• bug fix with negative test for dual DH operating on data handlers tha… (#179) @grantbuster
• Bnb/ddh norm (#180) @bnb32
• Significant refactor on handling of feature names in DataHandler and model (#178) @grantbuster
• stdev and mean hot fix (#177) @bnb32
• fix get_clearsky_ghi function to use correct time slice (#176) @spodgorny9
• Bnb/dev (#173) @bnb32
• Bnb/nc collector (#175) @bnb32
• Add ability to specify duplicate command names in Pipeline (#174) @ppinchuk
• Bnb/train only features hot fix (#171) @bnb32