fix make_pair C++11 - use std::pair<,>()
fix implicit conversion from double to uint
enable std=c++0x, since gcc4.6 doesnt support c++11

c++11 is since gcc4.7+, Includes.am
silence expected stric-aliasing warning for this specific case

using dirty magic to do the check, the warning is known to occur there,
and is not a bug/warning.
Merge branch 'master' into c++11-clang-modernizer-lite
important fix: -Wnarrowing, this allows c++0x

fix casting warning/error in swig generated math_py.cpp file, now
c++11 shouldn't fail!

math_py.cpp:6671:47: warning: narrowing conversion of 'self->nta::SparseBinaryMatrix<UI1, UI2>::nCols<unsigned int, unsigned int>()' from 'nta::SparseBinaryMatrix<unsigned int, unsigned int>::nz_index_type {aka unsigned int}' to 'int' inside { } is ill-formed in C++11 [-Wnarrowing]
     int dims[] = { self->nRows(), self->nCols() };
                                               ^
switch gcc/clang specific compile flags

Conflicts:
	build_system/unix/Includes.am
Merge branch 'master' into c++11-clang-modernizer-lite
Merge branch 'master' into c++11-clang-modernizer-lite
README: removed pip hard dependency

with existing nupic-<platform> repos, pip is alternative way to install dependencies.

Ways to set up:
1/ use nupic-linux64 / nupic-darwin64 repos
2/ install all required dependencies by yourself manually
3/ pip install -r external/common/requirements.txt
Merge branch 'master' into c++11-clang-modernizer-lite
dummy
Merge branch 'master' into c++11-clang-modernizer-lite
Merge pull request #355 from breznak/c++11-clang-modernizer-lite

initial support for C++11 / C++0x, light ver of PR #321