simple flow table match,need to be tested
fixed simple flow_table_ match,
node's color change when match occured,
actions only support output (but flood not support yet)
add vlan & tos-bits, support output=flood
only the higher priority match_flows will be processed
"tos-bits" is replaced with "tosBits"
Merge remote-tracking branch 'upstream/dev' into flowhighlight
support more actions:
set-src-ip/set-dst-ip
set-src-port/set-dst-port
set-src-mac/set-dst-mac
set-tos-bits
Merge branch 'dev', remote-tracking branch 'upstream/dev' into dev
re-arrange the initial function code  and use the try-section for db
connection.
Naming the hourly table of the format  hourly%Y_%m_%d for everyday
Because the hourly tables is named as hourly%Y_%m_%d, modify the
statistic query handlers.
Add enable config for DB
Fix the dbname bug.
Add new module dbcollection, which periodically translate the hourly->daily
Provide the "Simulate" button
can directly simulate the flow without user input
Correct the wrong names
merge from upstream/dev
Add interval parm for dbcollections
Add  dailyToWeekly, weeklyToMonthly, monthlyToAnnually
Merge pull request #26 from hwchiu/core-issue#3

Finish statistic features in core
Merge pull request #25 from win911/flowhighlight

Finish flow highlight