[CB-2235] Encoded spaces to fix a test.

FileTransfer.download fails when the source URL has spaces.  One test was failing because an attempt was accidentally being made to download from a URL with spaces; once encoded, the test passes.
Tagging 2.4.0rc1
Add some links to InAppBrowser test page.

Can test starting at a local page and ending at a pdf.
Added inAppBrowser test helper

Added a note and superscript * on titles of tests that when running in iOS will leave the app with no way back. Just a helper so I don't have to think when running the tests!
add test for generic CELL connection type
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-mobile-spec
update version for 2.4.0
update another ref to a cordova.js rc
start of moving/rename for benchmarks