Language files update

[labpaw]

Language files from old repo: https://github.com/cpw/ironchest

• pt_PT by @Vazkii from: Added Portuguese (pt_PT) localization cpw/ironchest#39
• pt_BR by @wfcreations from: Create ironchest pt_BR translation cpw/ironchest#53
• el_GR by @vasouv from: Created Greek lang file cpw/ironchest#45
• nb_NO by @terran87 from: Norwegian Translation cpw/ironchest#50
• nl_NL by @TDarkShadow from: Created nl_NL.lang cpw/ironchest#48
• zh_CN by @crafteverywhere from: Create zh_CN.lang cpw/ironchest#49
• tr_TR by @ToLToL from: Create tr_TR.lang cpw/ironchest#54
• et_EE by @ghost from: Create et_EE.lang cpw/ironchest#55
• de_DE update by @Vexatos from: Silly chest cpw/ironchest#51

These files shouldn't be lost.