[IMP] website: create customize theme application and color-picker; Create theme_bootswatch and use less files.
[IMP] project : move all fields planned_hours, effective_hours,
    total_hours, progress_rate and etc for project.project and project.task in project
[IMP] project & project_timesheet : project_task_work remove object.
[IMP] project_issue : move fields progress for project.issue in project_issue_sheet with all dependancy.
[IMP] project_issue_sheet : add dependancy module project_timesheet.
[IMP] project_timesheet :remaining_hours fields overwrite function fields and move related xml views.
[IMP] hr_timesheet : set defaults value fix.
[IMP] project_timesheet : change model in yml test case.
[IMP] project : remove effective_hours in onchage method.