Re-Work with Simplified Chinese Translations

Legacy simplified Chinese i18n files from OpenX 2.8 were very much buggy:
 o Most characters were corrupted when UTF-8 was introduced to OpenX.
 o Incorrect/misleading translations, like 'contract' being mistaken for 'contact'.
 o Inconsistency on term for 'advertiser'.
 o Inconsistency on file structure from the i18n files for English.

So I decided to start translating from scratch, based on the English version of files from OpenX 2.8.10.
Currently the translation work is not completed yet. I've been working with the following priorities:
 o Text seen when working on daily routines as 'Default Manager' role
 o Text seen when working on daily routines as 'Administrator' role
 o Text seen when working as 'Default Manager' role and error occurs
 o Text seen when working as 'Administrator' role and error occurs
 o Text seen when installing/upgrading
 o Other text