Merge pull request #20 from zharovdv/issue/19

Fix primary PCB document detection in multi-PCB projects

Merge pull request #18 from zharovdv/issue/16

Avoid division by zero for empty text primitives

Merge pull request #17 from zharovdv/issue/16

Fix division by zero when text is empty

[+] Add customization section in README.md

[+] Add customization section in README.md

[+] Fixed if no project or schematic is loaded, or if compilation failed

[+] Add radius property for roundrect pads

[+] Typed consts are not supported

[+] Force directory create for output

[+] Circle support

[+] Fields in ibom (values and footprint too)

[+] Build-in font data in script for fail-safe