Update et_EE.lang
Delete es_ES.lang

Outdated. Names no longer exist.
Delete it_IT.lang

Outdated. Names no longer exist.
Delete nl_NL.lang

Outdated. Names no longer exist.
Delete pl_PL.lang

Outdated. Names no longer exist.
Delete tr_TR.lang

Outdated. Names no longer exist.
Delete zh_CN.lang

Outdated. Names no longer exist.
Merge pull request #28 from Adaptivity/patch-3

Update language files