Update History.md

Reflect changes made in v2.9.0 and v2.10.0

Merge pull request #296 from pylonide/development

v2.9.0

Merge pull request #255 from pylonide/development

v2.8.0 Release

Merge pull request #209 from pylonide/development

v2.7.0

Merge pull request #156 from pylonide/development

v2.6.0 Release

Merge pull request #92 from pylonide/development

v2.5.0

Merge pull request #64 from pylonide/development

v2.4.0

Merge pull request #58 from pylonide/development

v.2.3.1

Merge pull request #55 from pylonide/development

v2.3.0

Merge pull request #50 from exsilium/development

v2.2.2