DNA scanner pods now open and close like crates. This has fixed the following:
*Resolves #252 - Contents of dna scanners will be ex_acted properly.
*Resolves #125 - Mobs chestbursting in the scanner pod will no longer cause issues with entering/exiting the pod. The larva will be able to slither out (assuming it isn't locked), upon which the icon_state will update. Or it may be opened externally in a similar fashion.
*Items are no longer lost inside scanner pods when a mob is inside the pod with items and it mutates into a monkey or something.
*There are no longer any restrictions on having inorganic items on mobs being scanned.

Special thanks to Cheridan for the sprite-changes.

Modified   code/game/dna.dm
Modified   icons/obj/Cryogenic2.dmi
Changelog entry.
Map updated as per Tenebrosity's request - tables moved in genetics.

Modified   html/changelog.html
Modified   maps/tgstation.2.1.2.dmm
Merge branch 'DNAscannerIssues' of https://github.com/Carn/-tg-station into carnDNAmachine

Conflicts:
	html/changelog.html - Resolved