Refactor for renaming ?

[inkhey]

Actually javascript package is named tracim_lib, as repo name as change (see tracim/tracim#574), we probably want to set it to tracim_frontend_lib in order to be more explicit.
same issue for apps , see :

• https://github.com/tracim/tracim_frontend_app_workspace_dashboard
• https://github.com/tracim/tracim_frontend_app_pagehtml
• https://github.com/tracim/tracim_frontend_app_thread