Tokenize-output

Extended the rstrip characters to solve this case:
bash
Before:
echo "Hello 'world'." | tokenize-output -p
Hello
world'.

After:
echo "Hello 'world'." | tokenize-output -p
Hello
world

README improvements.

Relaxing requirements for repeated characters. Now only special characters will be ignored.

python
Before:
echo 'Port is 4444' | tokenize-output -p
Port

After:
echo 'Port is 4444' | tokenize-output -p
4444
Port

Maintenance release.

Using `demjson3`. Thanks amitkot !

Fix url