Add transport rxn GPR

[feiranl]

Main improvements in this PR:

• Addressing issue #171:
• This PR is mainly for adding GPR rules to transport rxns according to different databases, mainly TCDB annotation. All information are stored in the file of TransRxnGeneAnnotation.tsv
• addTransNewGPR.m is the function that we used to adding new GPRs to rxns.
• Reaction confidence scores were also updated with addConfidenceScores.m (leading to changes in some unexpected rxns due to old PRs not updating them).

I hereby confirm that I have:

• [X] Tested my code with all requirements for running the model
• [X] Selected devel as a target branch (top left drop-down menu)
• [X] If needed, asked first in the Gitter chat room about this PR

[feiranl]

Okay, will change the confidence score today.

[feiranl]

I used this function, and found also confidence score of other rxns will also change.

[feiranl]

I include this note in last commit, confidence scores for those rxns which don't belong to this PR were also changed : Note: r_0475, r_1667, r_1729, r_1805, r_2025, r_2064, r_4403 ,r_4435, r_4484, r_4598, r_4599 rxn confidence scores were also changed since they have gRrules.