Antimony 0.7.6

This is a major release in terms of architecture:
All nodes are now defined as scripts, and scripts now have the power to define UI primitives (points and wireframes) that show up in 3D views.

Files saved with 0.7.5 and earlier will be automatically upgraded to using script nodes (instead of hard-coded nodes). This backwards compatibility will be removed in later releases.

If you have a file for which automatic upgrading fails, send it in as a bug report for further investigation.

Features:

• Added fab.ui namespace, with hooks to create 3D view objects from scripts.
  • fab.ui.point allows points with user-defined drag functions
  • fab.ui.wireframe creates user-defined wireframes
• Added fab.color namespace with a set of standard colors.
• Ported all hard-coded nodes into scripts.
• Skip early render stages if they are sufficiently fast.
• Show error message if Save As or Export target file isn't writable.
• New inspectors are placed in the center of a canvas if possible.
• Automatically upgrade hard-coded nodes in older files to scripts.

Bugfixes:

• Build issue: sb directory is now created before subfolders are copied.
• Off-by-one line highlighting error in script panes.
• Weird namespace issue in scripts.
• Remove white border in script UI (Linux).