database : epoch only time possibility

* Delete the possibility to ask for a date
  the only format possible is the time epoch
core : the route to get the time only epoch

* The route to get the server time doesn't accept
  parameter, and will always respond with an epoch
  time .

Signed By: PXke
templates admin: fully dynamic interface

* Addition, deletion, modification in real time.

* In case of concurrent modification, almost real
  time modification for everybody.
harvesting : hot fix for boinc_harvesting

* fixes a bug in the boinc_harvesting function
  due to how was processed the dump file.

* fixes how is used the dump file function to use
  it correctly with the new way of working.

Signed By: PXke