context 6.x-3.0-beta1

Consider this a major branch upgrade task if you are updating from the 2.x branch. Read README.txt first, make a backup and don't get pwned.

• #710392 by Will White: Bad call time pass by ref.
• Making description and tag translatable in exported contexts.
• Adding docs.
• Switching user condition to check against current user's roles.
• #574506 by jcdenton.dm, yhahn: Add taxonomy term condition to context.
• #664256: Handle node view and node form pages managed by CTools page manager.
• #632322 by Ryan Palmer: Language condition.
• #684398: Move sitewide condition to the latest position in condition stack as to act as a fallback.
• #650200: Introduce AND and OR condition modes.
• #701944: Don't render editing markup for anonymous users.
• Markdown-compatible README.txt
• #694828 by swentel: Fix for PHP notice.
• #654742: Show all page displays for views even if there is only one.
• Human readable name for features component.
• Splice contextpreprocesspage() into preprocess stack immediately after templatepreprocesspage().
• Adding test for bookroot condition.
• Properly pass to the bookroot plugin when viewing node forms.
• Only provide page displays as Views conditions in editor.
• Fix for bad condition value storage in book plugin.
• Disable text selection during editing.
• Check that there are blocks in a category before outputting the div wrapper.
• JSON for IE7.
• Ensuring that blocks containing script tags do not trigger jQuery fail.
• Specify dragging only by handle and allow blocks with forms to be interacted-with.
• Properly allowing blocks to override their properties in hook_block = 'view'.