Add numpy array creation examples
Add query examples
Add reshape examples
Add indexing examples
Generate array using fromfunction
Rename function: test -> test_all
Create array using frombuffer
Add elementwise operation examples
Add simple statistic examples
Make print_var print object id
Add copy examples
Rename file as well as functions: ex -> demo
Reshape using newaxis or None
Add stack examples
Add split demos
Merge branch 'numpy'