PR adding code to create public release (downloadable files)

[ch-kr]

PR adds code to create three release files:

• HT
• TSV with RMC results
• TSV of transcripts searched for but without RMC results

Note that the current browser release HT exists at this temp path gs://regional_missense_constraint/temp/demo_release.ht with the following schema:

----------------------------------------
Global fields:
    'p_value': float64 
    'all_canonical_transcripts': set<str> 
    'qc_pass_transcripts': set<str> 
    'outlier_transcripts': set<str> 
    'extra_transcripts': set<str> 
    'outlier_transcripts_searched': set<str> 
    'transcripts_searched': set<str> 
    'transcripts_no_rmc_all': set<str> 
    'transcripts_no_rmc_qc': set<str> 
    'rmc_transcripts_all': set<str> 
    'rmc_transcripts_qc': set<str> 
----------------------------------------
Row fields:
    'transcript': str 
    'regions': array<struct {
        start_coordinate: locus<GRCh37>, 
        stop_coordinate: locus<GRCh37>, 
        start_aa: str, 
        stop_aa: str, 
        obs: int64, 
        exp: float64, 
        oe: float64, 
        chisq: float64, 
        p: float64
    }> 
----------------------------------------
Key: ['transcript']

My current plan to run this code is to:

• Read in the temp HT above
• Update the names of the globals so they are consistent with the globals listed here
• Write the HT to its resource path
• Run regional_constraint.py with create-release command