Gas Optimizations

[code423n4]

See the markdown file with the details of this report here.

[c4-judge]

Picodes marked the issue as grade-a

[0xhiroshi]

G-01 addressed in other issues
G-02 valid
G-03 valid
G-04 invalid
G-05 invalid - it's a generalized lib for multiple projects
G-06 invalid - addressed in other issues

[c4-sponsor]

0xhiroshi requested judge review

[c4-judge]

Picodes marked the issue as selected for report

[Picodes]

All findings are theoretically valid in my opinion, although it would not make sense to implement 5 and 4 and 6 provide very little value to the sponsor, if any