changes don't have to be up to date for a prerelease
Revert "Plus symbols in the URL should be converted to spaces when considered as param values. Closes #463."

This reverts commit babe1e84230c57ac2b998324521509a0853131d3.

Conflicts:
	lib/sinatra/base.rb

Fixes #638
add test for + behavior
update CHANGES
Merge branch 'master' into prerelease
1.4.0.c release