Spelling and Wording Corrections, Clarification to Sections, Adjustments for SGA Guidelines

Corrected spelling and wording errors present. Also provided clarifications in some sections, e.g. operator privilieges and eligibility for office of those with non-US amateur radio licenses. Adjusted the sections concerning associate members so as to revoke voting privileges (SGA guidelines prohibit associate or honorary members from voting).

While here, specify T1 font encoding to fix rendering of Libertine fonts by TeX Live on *buntu.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	constitution.tex
Merge pull request #1 from rfrederick/master

Spelling and Wording Corrections, Clarification to Sections, Adjustments for SGA Guidelines