Update web.xml

Version 2.5 should be under javaee namespace.
Update README.md

Some notes to the CDX-Server Configuration
robotstxt parsing fix:
any line between multiple UA lines causes new rules to be used for the next UA, otherwise
use rules from prev UA if parsing adjaced UA lines
fix comment, spacing
add more tests for RobotRules, based on GYBA spec and RFC
fix wrong expectation in RobotRulesTest.
Dealt with a small resource leak.
add test case capturing entity-unescaping issue described in ARI-3774
documentation and cleanup.
update RobotRulesTest for capturing "line with space before colon gets ignored" bug.
FIX: directive with space before ":" gets ignored (ref. WWM-98)
disable test assertions we don't fix at this time, so that CI doesn't report a build failure.
Merge pull request #12 from internetarchive/robots-fix

Robots parsing fix
minor refactoring (drop unused argument, change return type to more general one)
add bare-minimum test for EmbeddedCDXServerIndex.
fix ARI-3713. set regular expression on statuscode field to new baseStatusRegexp property.
add more tests to FastArchivalUrlReplayParseEventHandlerTest (HTML entity escape/unescape)
fix AIR-3794: Wayback unescaping of url causes 404.
now WB re-escape rewritten URL before writing it out.
revert method signature change to maintain compatibility with existing AIT wayback.
Merge pull request #16 from kngenie/ARI-3713

Add a property to EmbeddedCDXServerIndex for customizing default statuscode filter.
removing url truncation in timemap, see https://github.com/iipc/openwayback/issues/106