* Fix#54: Add bitwise OR operator and make it available in PKVM
Like the bitwise AND, this is an implementation for pocketlang to
support the bitwise OR operation. In addition, updated "value" ->
"result" in other operation to correctly reflect the container's
purpose. It's indeed the result after the operation, which is a value
too.
In addition, add tests for bitwise AND (&) and bitwise OR (|). Add a
print statement in test file with message that all tests passed with
no errors.
* Fix typo in comment
* Cleanup fixes
I've also written tests in the corresponding test files, please have
a look. But on the command line (after compiling the source), do:
>>> from math import *
>>> print(cos(1))
[ results will be displayed here ]
>>> print(tan(1))
[ results will be displayed here ]
