ENH: Update OpenIGTLink project and module to activate connection error log.

OpenIGTLink updates:

$ git shortlog 849b434..daa957a --no-merges
Adam Rankin (2):
ENH: Reducing Slicer log spam by only outputting a connection failed message if requested
ENH: Changing error log output default to true to preserve current behaviour

Andras Lasso (1):
ENH: Removed duplicate code in SetPolyDataInfo

Junichi Tokuda (6):
STYLE: Fix indent style.
BUG: Correct order of vertex on a polygon.
Add .travis.yml
ENH: Update .travis.yml to test for Mac OS X.
ENH: Update README to include build instruction.
STYLE: Shorten README.md.

Matt Clarkson (4):
0000048: Add SetTimeInNanoseconds and GetTimeStampInNanoseconds to igtl::TimeStamp
0000048: Formatting for readability
0000056: Added Factory class for non-query message types
0000056: Add include for use on Scientific Linux gcc 4.4.7

unknown (2):
BUG: Fix allocation error for BindMessage Add padding for name table section size. 0000063
BUG: empty polydata causes exception. #74

OpenIGTLinkIG updates:

$ git shortlog 480e5cf..9271ec5 --no-merges
Adam Rankin (1):
ENH: Adding UI and MRML property to enable toggling of error log spam when IGT server is unavailable

Andras Lasso (1):
ENH: Removed TRANSFORM_NODE_MATRIX_COPY_REQUIRED ifdefs

From: Junichi Tokuda <tokuda@bwh.harvard.edu>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@24920 3bd1e089-480b-0410-8dfb-8563597acbee