Global javascript code cleanup and optimisation

Fixed unused variables.

Switched to compressed javascript and css files using the yui-compressor

Code cleanup and compress.

Version 0.3.16

Implemented products.secondary_end_sg field. The missing values are updated by the crontask.

Stil more missing fields added...

Version 0.3.15. Implemented final pH during packaging. Updated prod_new, prod_duplicate, prod_edit, rec_toproduct for this new field and several other fields added in previous versions.

Version 0.3.14. Added yeast viability calculations for liquid yeast packs.

Added comments about pitchrate

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