Merge pull request #3 from ericshulman/master

TW266 full release
updated index.html, index.xml, empty.html, empty.zip
content update

SiteTitle, SiteSubtitle (ELS - previously omitted by pull.bat)
HostingOptions (JR - note server-side node.js)
MainMenu (JR - updated copyright)
posted new beta build (TW270b1)

try...catch wrappers around EnablePrivilege (supress error
messages)TiddlySaver.jar UTF8 fixes and new signed cert, updated jquery
(v1.8.1)
posted new beta build (TW270b2)

fixes for import: construct valid URI from browse-for-filename, and
bypass ajax handling for LOCAL filesystem I/O when privs are not granted
(uses TiddlyFox-enabled loadFile for direct I/O)
content update: What's New
TW2.7.0 release

TWCore file I/O fixes
TiddlySaver.jar updated (built by BidiX and Grmbl)
content updated:
WhatsNew, HelloThere, TiddlyWiki Browser Compatibility
posted new beta built (TW271b1)

New TW5 build tooling.
No TWCore code changes.
fix SiteSubtitle content

corrected date (now reads "March 2013")
new beta 270b1 with jQuery1.8.3
revised content for 270b1

added 'download now' (link to empty.zip) in HelloThere
updated WhatsNew (re jQuery 1.8.3)
copied index.html to tiddlywiki.html (for TiddlySpace alpha usage)
edits to WhatNew content