This commits adds two reset buttons to the interface page.
One button allows the reset of all interface counters, namely,
packets and bytes received, packets dropped, and the number of
flows exported and dropped (when mysql or elasticsearch is enabled).
The other button allows the reset of only the drops.
Database updates are now performed asynchronously.
The web server starts but notifies the user with a
'please wait' message until the updates are completed.
The limit in the number of rows that can be retrieved from MySQL
has been made configurable. This is useful especially when downloading
historical flows in txt format.
Added .gitignore file for ignoring selected files
Reworked src and include paths to organize the source better
Fixed bug with invalid git version caused in some settings that do not compile code extracting it from github
