bump bugfix version

bump version to 2.5.3

bump version to 2.5.2

Merge pull request firmata#259 from firmata/v2.5.1

Bump version to 2.5.1.

Merge pull request firmata#244 from firmata/v2.5

prepare for v2.5 release

typos and clarifications

Merge pull request firmata#191 from firmata/ethernet

Add StandardFirmataEthernet example

bump version

Merge pull request firmata#186 from firmata/analog-reporting-fix

prevent analog reporting during system reset