CrashPrevention阻止一些简单bug，防止程序crash，比如：数组越界License: MITObjective CMCQRScanLicense: MITQW_HttpQWKJ's http toolLicense: MITObjective CQWCrashReporterqwkj 日志上传第一个正式版本License: MITObjective CWZ_OKRobotThe package of useful tools, include categories and classesLicense: MITObjective C
