Copy parser files from parser-indexer to this repository

[wkiri]

Since our parser capabilities no longer depend on Solr, it would make sense to migrate the relevant parser scripts (and issues) to the MTE repository (leaving current versions of the parser scripts as-is in the parser-indexer repo).

Then, we can also remove the dependency on the parser-indexer repo in this repository.

[stevenlujpl]

In order to copy the parser scripts to the MTE repo, we need to accomplish the following steps:

• [x] Copy the parser scripts to the MTE
• [x] Convert the README file in the parser-indexer repo to a wiki document on the MTE repo
• [x] Create a README file that contains instructions of using the parser scripts

[stevenlujpl]

@wkiri I've copied the parser scripts to the parser branch of the MTE repo. In addition, I also copied the util scripts log_utils.py and io_utils.py to the MTE repo. I slightly modified the util scripts to remove the methods that we don't need in MTE repo.

I tested the lpsc_parser.py script, and everything works as expected. I think from now on we can use the lpsc_parser.py in the MTE repo.

Currently, we have three util scripts (name_utils.py, log_utils.py, and io_utils.py) in the MTE repo. Do we want to merge them together in one util script?

[wkiri]

I think it is fine to have separate utils scripts.