Update quantities.js

[rjanicek]

• updated pica and point length units to contemporary desktop publishing standard
• current units are Traditional American standard
• the contemporary standard is more likely to be the desired unit
• http://en.wikipedia.org/wiki/Point_(typography)
• 1 point = 0.000352777778 meters
• http://en.wikipedia.org/wiki/Pica_(typography)
• 1 pica = 0.00423333333 meters

[rjanicek]

The current values are Traditional American standard. The contemporary desktop publishing standard is probably more likely to be the desired unit. The pica unit is also Traditional. I update the pull request to include contemporary point and pica units.

[rjanicek]

Thank you!

[gentooboontoo]

@rjanicek Thank you.