Fixed origin_tech in manipulator items
Fixed origin_tech in pacman circuitboard
Removed redundant origin_tech declarations

Some of them were misspelled, too.
Merged two lines with origin_tech

One used to overwrite the other.
Replaced empty string with null in origin_tech

Changed it to keep in line with what seems to be a standard.
Changed toy double saber's origin tech to null
Fixed origin_tech in lesser scroll
Fixed origin_tech in both weapons
Fixed origin_tech in experimental welding tool
Merge pull request #1 from Sugarette/spellcheck

Trying to update my fork