Minor corrections
Merge pull request #18 from crackerizer/master

Some schematic symbols
Revert some changes made by last pull request

Few docs entries has been accidently removed from display.dcm
Applied library convention to ACS754SCB-200.
Reduced symbol size of ACS754SCB-200-PSF.
Merge branch 'master' of https://github.com/KiCad/kicad-library