Store layouts in workspace

Fix #56
Fix #6
Update version
Store relative paths in session
Escape tab label in session
Handle V1 workspace format
Update logo
Update logo path
Update plugin window gfx
Update README
Add br tag
Use div instead of h1
Update README
Update docs
Improve wording
Add lists gfx
Add lists gfx
Load workspace only if arglist is empty

Fix #61
Update graphics
Update docs
Update gfx paths before merge