Initial commit of net_latency module#201

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geokapp wants to merge 5 commits intoganglia:masterfrom

Commits on Jun 23, 2015

Initial commit of net_latency module
Giorgos Kappes
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Commits on Jul 9, 2015

Added description of new module parameters
Giorgos Kappes
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Added new module parameters
Giorgos Kappes
committed
Added pinger thread and ping timeout
Giorgos Kappes
committed
Fixed typo
Giorgos Kappes
committed