Update sensors.lib to match Library Convention rules

* Most of symbols has been significally altered.
* Couple of symbols have new names match the names of their
manufacturers.
* The pins had been aligned to 100mil grid and their functions were
reviewed and amended.
* Pin numbers and names changed to 50mil height.
* Fields changed to 50mil height.
Update cypress.lib to match Library Convention

* The pins had been aligned to 100mil grid
* Pin numbers and names changed to 50mil height.
* Fields changed to 50mil height.
ATMEGA8U2 symbol added to atmel.lib
ATEMEGA8U2 in atmel.lib updated to match library conventions

* Pin ends aligned to 100mil grid
* Vcc and GND pins moved to top and bottom respectively
Description added for ATMEGA8U2 in atmel.dcm
Update cypress.lib - Show hidden pins
added dfn 3d models
ATMEGA8U2 symbol improved

* XTAL1 set to input pin type
* UVCC, D+, D-, UGND pins rearranged
* RESET, SS, HWB, CTS, RTS overscored in pin description
* QFN-32-1EP added to footprint list
Aliases ATMEGA16U2 and ATMEGA32U2 added to ATMEGA8U2
Merge pull request #47 from arunisaac/atmega8u2

ATmega8U2/16U2/32U2 symbol added to atmel.lib
Merge pull request #51 from lifton/master

Added common cathode RGB LED symbol.
Merge pull request #53 from michal777/master

Added hudge set of DFN 3D models
Merge pull request #44 from keruseykaryu/master

Update sensors.lib and cypress.lib to match Library Convention rules
Changed shell pins of USB Mini B connector to passive pins, added alias for USB Micro B, normalized field value font sizes and pin spacing.