* doc: fix return parameter for void method

* docs: add missing parameter description

* android: fix build warnings

* build: fix warnings

bioinspired: prevent call ocl implementation when log sampling is enabled in retina (there is no log sampling kernel)

This patch update bioinspired opencl code to make it working
with latest opencv, major changes include:

1. data structure update, e.g. oclMat to UMat.
2. opencl kernel optimization to get it running faster
3. accuracy and perf test update.
Signed-off-by: Li Peng <peng.li@intel.com>

Bioinspired module: remove printSetup to avoid unnecessary printing in the console, fix some typos. (#905)

see https://github.com/Itseez/opencv/issues/6370

Fixes https://github.com/Itseez/opencv_contrib/issues/332

Relevant material:
http://stackoverflow.com/questions/6066273/pointer-into-vector-but-not-into-a-valarray
http://objectmix.com/c/40001-address-first-member-valarray.html
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#389

I have to admit my naivety here, this issue is was complex for me
to diagnose. It appears that in the MSVC 2008/2010 implementation
of std::valarray, when indexing and assigning to a const variable,
that the const version of the member function
valarray<T>::operator[](size_t) returns a value instead of a
const-reference. Therefore, taking the address of this is a
compiler error as you can't take the address of an lvalue. By
performing a const_cast on the array we change which function
is called and thus we actually do recieve a const-reference.
This should not effect other compilers.

replaced "const InputArray" with "InputArray" to avoid warnings about "const const _InputArray&"

added a local extremum blob detector that can be used after retina module to detect transient areas (low level saliency)