Add molex smd connector footprints.

The following Molex connectors are included here.

• PicoBlade
  • http://www.molex.com/pdm_docs/sd/533980271_sd.pdf
  • http://www.molex.com/pdm_docs/sd/532610271_sd.pdf)
• Pico-Clasp
  • http://www.molex.com/pdm_docs/sd/5013310207_sd.pdf
  • http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf
• Pico-EZmate
  • http://www.molex.com/pdm_docs/sd/781710002_sd.pdf
  • http://www.molex.com/pdm_docs/sd/2026560021_sd.pdf
• Panelmate
  • no datasheet found (needed to trust the old footprints)

Script: https://github.com/pointhi/kicad-footprint-generator/pull/81

I discovered that the picoblade and pico ezmate had slightly wrong pad sizes and positions. (according to the datasheets) For panelmate i could not find a good datasheet. (not available for new business. But still available at distributors.)

I choose the molex naming for the series name. We did not really get to a conclusion in https://github.com/KiCad/Connectors_Molex.pretty/issues/58 (@jkriege2, @evanshultz, @Shackmeister did not care to comment.)

Now the fun part. The screenshots. (Footprints on the back side are the old once. Yes i added a few connector types.)