[pipes-functions] Adding get and post function

[pratikmota]

Changes:

1. Adding get function
2. Adding post function
3. For Close Pipe - if pass - return 0, previously it was nil. (previous PR change)

Test:
get function - I have created a local server for testing and then passed 127.0.0.1:8080 URL

check by curl

post function -

check by curl

close - return 0 (previous PR change )

tested - args: It is a printing passed argument. ( previous PR change )

Related previous PR comment. I tried cc pipes instead of do\par pipes . It is giving block output. May be this thing you were saying or may be i missed something in understanding.

[refaktor]

Nice progress! Thank you.