0.2.0-beta2

Changelog

• Add grid, pan (left-click) and zoom (wheel).
• Add selection tool (right-click).
• Improve blocks and wires appearance.
• Improve blocks and wires behavior.
• Add basic > info block.
• Edit code block ports by double-click.
• File menu: add basic examples.
• File menu: add templates.
• File menu: Export verilog and PCF.
• Edit menu: Add Image path.
• Add View menu and Reset view item.
• Tools menu: add verify (uses apio > icarus verilog).
• Tools menu: improve toolchain installation.
• Add config block: input-config (pullup).