Transformation functions

[coveralls]

Pull Request Test Coverage Report for Build 139

• 176 of 225 (78.22%) changed or added relevant lines in 13 files are covered.
• 5 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.05%) to 69.759%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
skensemble_io.go	12	13	92.31%
transformation/transformation.go	8	10	80.0%
util/util.go	16	18	88.89%
xgblinear_io.go	13	15	86.67%
xgensemble_io.go	11	13	84.62%
leaves.go	29	32	90.63%
transformation/logistic.go	10	15	66.67%
transformation/raw.go	9	14	64.29%
transformation/softmax.go	10	15	66.67%
lgensemble_io.go	41	63	65.08%
<!--	Total:	176	225	78.22%	-->

Files with Coverage Reduction	New Missed Lines	%
skensemble_io.go	1	75.33%
lgensemble_io.go	1	71.62%
leaves.go	3	85.81%
<!--	Total:	5		-->

Totals
Change from base Build 133:	0.05%
Covered Lines:	1797
Relevant Lines:	2576

---

💛 - Coveralls