modify instructions parser with ``any`` and add some idea to README.rst
update README.rst
update README.rst
fix bug of n-drop
add and modify ws2.py which is the lite version
adjust LXX operations all have only PCs.append
let the job "reading code to Instructions" into two step
balance the jobs of twice parsings, and adjust flow control operations
test using ``eval``; add global because closure
modify parsing to less code. the logical is implement before