Replace "servitude" with "service" in #Art1S2

Art. 1. sect. 2. On motion of Mr. Randolph the word "servitude" was struck out, and "service" unanimously inserted, the former being thought to express the condition of slaves, & the latter the obligations of free persons.
Merge pull request #4 from RandolphReply/master

Replace "servitude" with "service" in #Art1S2