gyp: support C++11
src: use template to rewrite Matrix
src: added 'Complex.hpp'
src: added 'Complex.toString()'
test: added 'Complex.toString()' testing
readme: add 'Complex()' api
src: fixed a problem in g++ with C++11
gyp: travis-ci dosen't support '-std=c++11', using '-std=c++0x' to substitute '-std=c++11'
travis: show the version of
travis: install a package 'clang-3.4'
travis: remove the package 'clang-3.4'
gyp: change '-std=c++0x' to '-std=gnu++11' for linux
travis: show compiler versions
travis: fixed a mistake
travis: export CXX="clang++"
travis: install package 'g++4.8'
travis: fixed a mistake
travis: added 'add-apt-repository'
gyp: change '-std=gnu++11' to '-std=c++11' for linux
gyp: change '-std=c++11' to '-std=c++0x' for linux