Minor fix in MatAllocator::upload
Minor fix in MatAllocator::copy
Minor fix in setSize function
Minor fix in Mat::Mat
Minor fix in cvMatNDToMat function
Minor fix in _InputArray::getMatVector
Minor fix in _InputArray::getUMatVector
Minor fix in cv::hconcat
Minor fix in cv::vconcat
Minor fix in cv::setIdentity
Minor fix in cv::trace
Minor fix in transposeI_ template function
Minor fix in reduceC_ template function
Minor fix in sort_ template function
Minor fix in sortIdx_ template function
Minor fix in cvRange function
Minor fix in MatConstIterator::seek
Minor fix in SparseMat::create
Minor fix in SparseMat::copyTo
Minor fix in SparseMat::convertTo
Minor fix in SparseMat::convertTo
Minor fix in SparseMat::ptr
Minor fix in SparseMat::resizeHashTab
Fixes indentation

In cases where the signaure string contains a terminating character,
the std::string member function size returns a smaller value than the
allocated string. In these cases, if you then try to use substr,
you will get an out_of_range exception. This patch remedies the problem.

This patch implements the PAM image format as defined at:
http://netpbm.sourceforge.net/doc/pam.html

The PAM format provides a generic means for storing 2 dimensional information.
This is useful for opencv since there are cases where data gets translated into
non standardized formats, which makes it difficult to store and load this information.

* Improve Canny by using _mm_movemask_epi8 to find next pixel magnitude greater than lower threshold. Added parallelized finalPass to Canny with variable gradients. Little changes in finalPass.

* Some things fixed

Fixed video input argument.

  * use universal intrinsic for accumulate series using float/double
  * accumulate, accumulateSquare, accumulateProduct and accumulateWeighted
  * add v_cvt_f64_high in both SSE/NEON
  * add test for conversion v_cvt_f64_high in test_intrin.cpp
  * improve some existing universal intrinsic by using new instructions in Aarch64
  * add workaround for Android build in intrin_neon.hpp

* Use `nth_element()` to find the median instead of `sort()` in `LMeDSPointSetRegistrator::run()`

* Improves performance of this part of LMedS from `n log(n)` to `n` by avoiding doing a full sort.

* Makes LMedS 2x faster for 100 points, 4x faster for 5,000 points in `EstimateAffine2D()`.

* LMedS is now never more than 2x slower than RANSAC and is faster in some cases.

* Added 2-channel ops to match existing 3-channel and 4-channel ops

* v_load_deinterleave() and v_store_interleave()

* Implements float32x4 only on SSE (but all types on NEON and CPP)

* Includes tests

* Will be used to vectorize 2D functions, such as estimateAffine2D()

 - also some minor changes to the respective sample cpp file

* expose 2 extra methods from ml::TrainData: getNames() and getVarSymbolFlags(). The first one returns text labels from CSV (if the data has been loaded from CSV); the second one returns a matrix of boolean values; its n-th element is 1 iff the corresponding column in the CSV uses symbolic names, not numbers.

* check that the dynamic_cast succeeds

* Add Grana's connected components algorithm for 8-way connectivity. That algorithm is faster than Wu's one (currently implemented in opencv). For more details see https://github.com/prittt/YACCLAB.

* New functions signature and distance transform compatibility

* Add tests to imgproc/test/test_connectedcomponents.cpp

* Change of test_connectedcomponents.cpp for c++98 support