make exception message less ambiguos

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1639570 13f79535-47bb-0310-9956-ffa450edef68
document readBits EOF behavior explicitly

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1639571 13f79535-47bb-0310-9956-ffa450edef68
base BitStream on BitInputStream

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1639572 13f79535-47bb-0310-9956-ffa450edef68
I think a number is greater, not bigger

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1639573 13f79535-47bb-0310-9956-ffa450edef68