Add functions for new Hazard endpoints

[rachmaninoffpk]

There are new resources in the Hazard data domain, with several endpoints in each resource. Create new functions to wrap these endpoints.

[madison-feshuk]

Hazard endpoints:

CTX Hazard API Resource/Endpoint	ctxR Status
ToxValDB Hazard Resource	--
POST: Get all data by batch of dtxsid(s)	Update get_hazard_by_dtxsid()
POST: Get human data by batch of dtxsid(s)	Deprecate get_human_hazard_by_dtxsid()
POST: Get eco data by batch of dtxsid(s)	Deprecate get_eco_hazard_by_dtxsid()
GET: Get all data by dtxsid	Update get_hazard_by_dtxsid_batch()
GET: Get human data by dtxsid	Deprecate get_human_hazard_by_dtxsid_batch()
GET: Get eco data by dtxsid	Deprecate get_eco_hazard_by_dtxsid_batch()
ToxValDB Skin Eye Resource	--
POST: Get data by batch of dtxsid(s)	get_skin_eye_hazard_batch()
GET: Get data by dtxsid	get_skin_eye_hazard()
ToxValDB Cancer Summary Resource	--
POST: Get data by batch of dtxsid(s)	get_cancer_hazard_batch()
GET: Get data by dtxsid	get_cancer_hazard()
ToxValDB Genetox Resource	--
POST: Get summary data by batch of dtxsid(s)	get_genetox_summary()
POST: Get details data by batch of dtxsid(s)	get_genetox_details()
GET: Get summary data by dtxsid	get_genetox_summary_batch()
GET: Get details data by dtxsid	get_genetox_details_batch()
PPRTV Resource	--
GET: Get all pprtv chemical data by dtxsid	NEW function needed **Assess utility of including in ctxR?
HAWC Resource	--
GET: Get CCD - EPA HAWC link mapper by dtxsid	NEW function needed **Assess utility of including in ctxR?
IRIS Resource	--
GET: Get all iris data by dtxsid	NEW function needed **Assess utility of including in ctxR?
ToxRefDB Data Resource	--
GET: Get data by study type	NEW function needed
GET: Get data by study id	Additional parameters in above function
GET: Get data by dtxsid	Additional parameters in above function
ToxRefDB Effects Resource	--
GET: Get data by study type	NEW function needed
GET: Get data by study id	Additional parameters in above function
GET: Get data by dtxsid	Additional parameters in above function
ToxRefDB Summary Resource	--
GET: Get data by study type	NEW function needed
GET: Get data by study id	Additional parameters in above function
GET: Get data by dtxsid	Additional parameters in above function
ToxRefDB Observation Resource	--
GET: Get observations by study type	NEW function needed
GET: Get observations by study id	Additional parameters in above function
GET: Get observations by dtxsid	Additional parameters in above function