update a lot of things :sleepy:
- adjust the structure of jsv8 tutorial
- use a static library to simple/unity all tutorials
- adjust the structure of make file
- ready to use gyp to generate all projects
- implement the native object (not finished :wink:)
- use the member function to implement the call function in the native object
- remove the `SetVar` function by the variable's pointer, it may to cause some kind of memory-visit error
update a comment about tutorial