[cxxtags] Added an error check.
[cxxtags][tune] Redesign and speed up database related processes. No longer threading is needed.
[cxxtags][cxxtags_html_dumper][cxxtags_gather][refactor] Changed to use cursor in database accesses.
[cxxtags][feature] Improve compatibility with gcc arguments.
[cxxtags_gather] Changed an error message.
[cxxtags_html_dumper][bug-fix] Added file path regalize process.
[cxxtags_gather][refactor] Fixed comment indent.
[cxxtags_html_dumper][refactor]