zh_tw translation for guide document - upgrade.txt.
zh_tw translation for guide document - upgrade.txt.

Signed-off-by: Jiahe Jou <dd3bbc45e8bb4051827b67d3e2064d116b034b7c@gmail.com>

Corfiot/yii,marcovtwout/yii,softark/yii,auburus/yii,jackey/YiiAPI-Framework,intersvyaz/yii,ImAnilChaudhari/yii,phoenix3008/yii,Vartacom/yii,lsjing/yii,YaDelivery/yii,guber007/yii,janisto/yii,licailing/yii,longhua828/yii,yiichina/yii,mqiu/yiis,longhua828/yii,yiisoft/yii,scriptius/blog,ImAnilChaudhari/yii,yiisoft/yii,marcovtwout/yii,l3xthanzero/trackstar,YaDelivery/yii,er361/yii-zadanie-somnium,janisto/yii,mqiu/yiis,marcovtwout/yii,sachintaware/yii,jackey/YiiAPI-Framework,dbalencar/yii,tvs-prarthana/yii,lsjing/yii,bethrezen/yii,scriptius/blog,tvs-prarthana/yii,GerrGIT/yii,trewor-kapusta/yii,licailing/yii,dbalencar/yii,Yanan1021/yii,YaDelivery/yii,GerrGIT/yii,auburus/yii,mudrezzz/testphp,longhua828/yii,tvs-prarthana/yii,kurorido1990/dev-github,sachintaware/yii,mqiu/yiis,tvs-prarthana/yii,mudrezzz/testphp,kurorido1990/dev-github,janisto/yii,lsjing/yii,lubosdz/yii,sachintaware/yii,l3xthanzero/trackstar,yiichina/yii,scriptius/blog,ImAnilChaudhari/yii,auburus/yii,GerrGIT/yii,mudrezzz/testphp,guber007/yii,GerrGIT/yii,YaDelivery/yii,longhua828/yii,Vartacom/yii,makasim/PayumYiiExtensionSandbox,er361/yii-zadanie-somnium,makasim/PayumYiiExtensionSandbox,licailing/yii,l3xthanzero/trackstar,Infowatch/yii,marcovtwout/yii,lubosdz/yii,phoenix3008/yii,Infowatch/yii,Yanan1021/yii,er361/yii-zadanie-somnium,intersvyaz/yii,bethrezen/yii,lubosdz/yii,trewor-kapusta/yii,janisto/yii,lubosdz/yii,makasim/PayumYiiExtensionSandbox,ImAnilChaudhari/yii,er361/yii-zadanie-somnium,lsjing/yii,intersvyaz/yii,wbfree/yii-tutorial,scriptius/blog,phoenix3008/yii,Vartacom/yii,yiichina/yii,sachintaware/yii,phoenix3008/yii,Vartacom/yii,softark/yii,kurorido1990/dev-github,dbalencar/yii,mudrezzz/testphp,Corfiot/yii,Yanan1021/yii,auburus/yii,guber007/yii,licailing/yii,kurorido1990/dev-github,wbfree/yii-tutorial,bethrezen/yii,makasim/PayumYiiExtensionSandbox,guber007/yii