Fixed editing of tool project.
Added link to home page to admin menu.
Added list of tools on project page.
Added list ot time slots on project page.
Removed containers from project page.
Fixed time slot validation.
Added #total_period for Project.
Added "Total period" on project page.
Added main menu.
Fixed typo
Added #total_period to Tool.
Added list of tools.
Added page of tools.
Added versions diagram on tool page.