v0.2.4

PerfChecker v0.2.4

Diff since v0.2.3

Merged pull requests:

• Fix congested printing of xticks (#63) (@VarLad)
• Fix a NaN issue in ChairmarkExt (#64) (@Azzaare)

Closed issues:

• Plot error with NaN values (#61)
• Versions should be printed vertically in plots (#62)