Fixed typographical error, changed aganist to against in README.
Fixed typographical error, changed aganist to against in README.

ifeelgoods/paper_trail,theRealNG/paper_trail,jashank/paper_trail,jashank/paper_trail,ifeelgoods/paper_trail,jnstq/paper_trail,jnstq/paper_trail,theRealNG/paper_trail,airblade/paper_trail,devonestes/paper_trail,airblade/paper_trail