Merge pull request #514 from dominicgs/travis

Avoid brew warning about python deps while uninstalling

HackRF One: replaced U20 with Winbond W25Q80DVSSIG

Merge pull request #478 from caquino/master

Merge pull request #1 from caquino/caquino/travis-osx-438

Replacing xcode version to check travis build failure.

replaced AVX/Kyocera 2500BL14M100T (NRND) with Abracon ABM8-25.000MHZ-10-D1G-T (X1), added load capacitors (C169 and C170)

listed Murata LDB182G4510G-120 as an alternative to Johanson 2500BL14M100T (T3 and T4)

replaced Murata LXES1TBCC2-004 (End of Life) with Vishay VBUS54CV-HSF-G4-08 (U15)

Merge pull request #469 from arnout/master