Update 3rdparty libs to the actual versions (Feature #1609)

updated libtiff: from 3.9.5 to 4.0.1 #1609

modified readme.txt (#1609)

Merge remote-tracking branch 'upstream/2.4' into merge-2.4

• #1538 from StevenPuttemans:bugfix_3283
• #1545 from alalek:ocl_test_fix_rng
• #1551 from alalek:cmake_install_win
• #1570 from ilya-lavrenov:ipp_warn_fix
• #1573 from alalek:perf_simple_strategy
• #1574 from alalek:svm_workaround
• #1576 from alalek:ocl_fix_cl_double
• #1577 from ilya-lavrenov:ocl_setto_opencl12
• #1578 from asmorkalov:android_fd_cp_fix
• #1579 from ilya-lavrenov:ocl_norm
• #1582 from sperrholz:ocl-arithm-additions
• #1586 from ilya-lavrenov:ocl_setto_win_fix
• #1589 from ilya-lavrenov:pr1582_fix
• #1591 from alalek:ocl_remove_cl_hpp_h
• #1592 from alalek:ocl_program_cache_update
• #1593 from ilya-lavrenov:ocl_war_on_double
• #1594 from ilya-lavrenov:ocl_perf
• #1595 from alalek:cl_code_cleanup
• #1596 from alalek:test_fix_run_py
• #1597 from alalek:ocl_fix_cleanup
• #1598 from alalek:ocl_fix_build_mac
• #1599 from ilya-lavrenov:ocl_mac_kernel_warnings
• #1601 from ilya-lavrenov:ocl_fix_tvl1_and_sparse
• #1602 from alalek:ocl_test_dump_info
• #1603 from ilya-lavrenov:ocl_disable_svm_noblas
• #1605 from alalek:ocl_fixes
• #1606 from ilya-lavrenov:ocl_imgproc
• #1607 from ilya-lavrenov:ocl_fft_cleanup
• #1608 from alalek:fix_warn_upd_haar
• #1609 from ilya-lavrenov:ocl_some_optimization
• #1610 from alalek:ocl_fix_perf_kalman
• #1612 from alalek:ocl_fix_string_info
• #1614 from ilya-lavrenov:ocl_svm_misprint
• #1616 from ilya-lavrenov:ocl_cvtColor
• #1617 from ilya-lavrenov:ocl_info
• #1622 from a0byte:2.4
• #1625 from ilya-lavrenov:to_string

Conflicts:
cmake/OpenCVConfig.cmake
cmake/OpenCVDetectPython.cmake
cmake/OpenCVGenConfig.cmake
modules/core/CMakeLists.txt
modules/nonfree/src/surf.ocl.cpp
modules/ocl/include/opencv2/ocl/ocl.hpp
modules/ocl/include/opencv2/ocl/private/util.hpp
modules/ocl/perf/main.cpp
modules/ocl/src/arithm.cpp
modules/ocl/src/cl_operations.cpp
modules/ocl/src/cl_programcache.cpp
modules/ocl/src/color.cpp
modules/ocl/src/fft.cpp
modules/ocl/src/filtering.cpp
modules/ocl/src/gemm.cpp
modules/ocl/src/haar.cpp
modules/ocl/src/imgproc.cpp
modules/ocl/src/matrix_operations.cpp
modules/ocl/src/pyrlk.cpp
modules/ocl/src/split_merge.cpp
modules/ocl/src/svm.cpp
modules/ocl/test/main.cpp
modules/ocl/test/test_fft.cpp
modules/ocl/test/test_moments.cpp
modules/ocl/test/test_objdetect.cpp
modules/ocl/test/test_optflow.cpp
modules/ocl/test/utility.hpp
modules/python/CMakeLists.txt
modules/ts/include/opencv2/ts.hpp
modules/ts/src/ts_perf.cpp
samples/android/face-detection/jni/DetectionBasedTracker_jni.cpp