js/CGP: scroll wheel zoom center position

Closes #111
Adding option to show time since last update on dashboard.

Closes #110
dashboard: make timeago dynamic using jquery + timeago
dashboard: timeago: show seconds, refresh every 5 seconds
dashboard: showtime: load jquery + timeago.js when config is set
js: import jquery 2.1.1
inc/html: include jquery from local source

So we don't depend on a remote source.
Revert "make detail page accessible when using "canvas" graph_type"

This reverts commit 82d88098f4203cf7402d4faf5ad100cada70efaf.

Breaks async rendering, see
https://github.com/pommi/CGP/issues/106#issuecomment-66896905
layout: make timeago smaller and give it some opacity
inc/collectd: vmem/vmpage_io should be split to multiple graphs per type instance

Closes #113
plugin/vmem: improve vmpage_io
plugin/mysql: replace TI by PI in title

Closes #112
plugin/mysql: remove defined colors from mysql_handler but rollback

I'd like rollback to be black. I don't care about the rest.
plugin/apache: don't use network_datasize for apache_bytes

network_datasize expects the source to be in bits.

Closes #107
Changed GenericIO to show min and max, as well as average.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	layout/style.css