cleanup of page titles

Added uppercase on first letter of the title, and made use of the title
variable in the templates.
notes :
- I removed titles for 2 pages where it was not used : worker and
add_shot
- Do we need this passing of title variable ? I guess it could become
useful one day.
- on a design note, we could have instead everything lowercase… as in
the logo… but i think it looks good like this.
added stats to server status

added a module, did not know where to put otherwise.
we could add things like server uptime etc…
fix error when loading Status page and server is offline