Prepare code for MIMIC-III v1.4

[alistairewj]

MIMIC-III v1.4 was just released - the import scripts for the various database systems should be updated. There is only one schema change: the HAS_IOEVENTS_DATA column of the ADMISSIONS table was removed.

For reference, the changelog from v1.3 to v1.4 is as follows:

#88 - Text data sourced from drop down menus or "pick lists" has been added to the database for Metavision patients. Users interested in the exact concepts added can query them as follows: select * from d_items where linksto = 'chartevents' and dbsource = 'metavision' and param_type = 'Text'. All data was added to CHARTEVENTS, and has increased the raw (uncompressed) size of the datafile by 5 GB.
#201 - Data in tables may now only occur within 1 year of a patient's hospital admission ADMITTIME and DISCHTIME. Observations outside this range corresponded to typographical errors in the CHARTTIME, and this unreliable data has been removed.
#197 - A small issue where a single observation was duplicated and assigned to two ICUSTAY_ID (and sometimes two HADM_ID) has been corrected: this affected 37 ICUSTAY_ID and 80 HADM_ID. Thanks @matteobonvini for the report.
#191 - A subset of patients were missing data due to the transition from CareVue to Metavision: this data has been restored.
#193 - Some laboratory concepts (particularly CD counts) were conflated (i.e. percentages mixed with counts) - these have been corrected. Thanks Yuqi Si for the report (via StackExchange).
#196 - The AMOUNT column in INPUTEVENTS_MV did not correspond to AMOUNTUOM (unit of measurement) - instead it corresponded to a "base" unit (e.g. grams instead of milligrams). Data in the AMOUNT has been updated to match the AMOUNTUOM where appropriate. This also effected the PROCEDUREEVENTS_MV table. Thanks @ngageorange for the report.
#198 - NULL values for character fields are now properly represented in the CSV file as empty fields with no double quotes. Database systems such as PostgreSQL will now recognize these fields as null when copying with the NULL '' qualifier.
#199 - Addendums to discharge summaries in the notes can now be distinguished in the NOTEEVENTS table: their CATEGORY has remained 'Discharge summary', but their description has been changed from 'Report' to 'Addendum'
#194 - The LOINC code for Total CO2 has been corrected (was 1959-6 total bicarb, is now 34728-6 total CO2)
#186 - Data has been harmonized into EST.
#180 - Some patients were erroneously labelled as in care unit 'TSICU': these have been corrected to 'CSRU'
#189 - Schema change: The HAS_IOEVENTS_DATA column in ADMISSIONS has been removed as it was antiquated.
#185 - Three text concepts (GCS, code status, RASS) had a null LINKSTO field in D_ITEMS, even though the data existed in CHARTEVENTS. This has been corrected. Note these were the only three text concepts available for Metavision patients in MIMIC-III v1.3 (see #88).
#60 - The date shift for dates in the TEXT field of NOTEEVENTS has been corrected: before it corresponded to a different date shifted used in MIMIC-II (easily identifiable by years occurring between 2500-3500). It now matches the dates in the structured data.
#188 - Negative microbiology cultures are now recorded in MICROBIOLOGYEVENTS - negative cultures can be identified by a NULL value for the organism name (ORG_NAME).

[alistairewj]

Build scripts are now tested and confirmed working for PostgreSQL, MySQL, and the Docker build (which also uses postgres). The other DB systems haven't been tested but the scripts were updated so they should work. Closing this and people can raise issues if they have trouble building the DB.