BUG: Coverity 1081062: Fix big parameter passed by value

The constructors for:
itk::Statistics::ImageToListSampleAdaptor::ConstIterator
itk::Statistics::ImageToListSampleAdaptor::Iterator
should have their first parameter passed by-reference, as it is an object.
The second parameter is just an unsigned int, so it can stay by-value.

Made the constructors for these 2 iterator classes use initializer lists.

Also cleaned up indentation style.

Change-Id: I0c990ac948565967cd8e12c37bb983f409597123
DOC: Improve documentation for StatisticsAlgorithm functions

Change-Id: Ibafadc912473c84f7bb54d7058b4a532366a0128
BUG: Coverity 1103200: Copy into fixed size buffer in GE5ImageIO

strtok is not guaranteed to be thread-safe and shouldn't be used anyway.

Change-Id: I7b71fbf047fc05745a4cefc6a67d92ff7ab97496
BUG: Coverity 1081422: Uninitialized pointer field in QuadEdgeMeshFrontBaseIterator

The initializer list is evaluated before the function body, so the
member variables can still be changed to non-NULL values later in the
function body.

Change-Id: I59c66de262b7cabb0bd45be2bee559a01ef21a5e
Merge topic 'cov_1081422'

d0fd9d55 BUG: Coverity 1081422: Uninitialized pointer field in QuadEdgeMeshFrontBaseIterator
Merge topic 'cov_1103200'

bc6316f2 BUG: Coverity 1103200: Copy into fixed size buffer in GE5ImageIO
Merge topic 'Statistics_SampleBounds'

84ae681c DOC: Improve documentation for StatisticsAlgorithm functions
Merge topic 'cov_1081062'

aac0ab33 BUG: Coverity 1081062: Fix big parameter passed by value