Improve docs (#16)

* orcid public api
* link to blog post

Author: Sandra Mierz

README.md

@@ -35,3 +35,5 @@ you can use this link to launch the notebooks on Binder where you can execute an
 In the joint project [TAPIR](https://projects.tib.eu/tapir/en/) (Partially Automated Persistent Identifier-based Reporting), partially automated procedures for research reporting are being tested in the context of university and non-university research. To this end, the question is being investigated : 
 
 To what extent can the necessary data aggregation be carried out on the basis of openly available research information using persistent identifiers?
+
+*More information in our blog post "[Project TAPIR: Harvesting the power of PIDs](https://blogs.tib.eu/wp/tib/2022/03/01/project-tapir-harvesting-the-power-of-pids/)"*

organization-people/orcid_get_people_by_organization.ipynb

@@ -8,7 +8,7 @@
    "source": [
     "### Query ORCID for people affiliated with an organization and filter for current employees only\n",
     "\n",
-    "This notebook queries the [ORCID API](https://api.orcid.org/v3.0/) for all [people affiliated with an organization](https://info.orcid.org/faq/how-do-i-find-orcid-record-holders-at-my-institution/) and additionally narrows down the affiliation to people **currently employed** by the organization. From the resulting list of people we output the ORCID iDs.\n",
+    "This notebook queries the [ORCID Public API](https://api.orcid.org/v3.0/) for all [people affiliated with an organization](https://info.orcid.org/faq/how-do-i-find-orcid-record-holders-at-my-institution/) and additionally narrows down the affiliation to people **currently employed** by the organization. From the resulting list of people we output the ORCID iDs.\n",
     "\n",
     "*Disclosure:\n",
     "The process of querying the ROR API for additional identifiers and using them to query the ORCID API for affiliated people is the same as used by the [FREYA PID Graph](https://blog.datacite.org/powering-the-pid-graph/) and is implemented in [DataCite Application API](https://doi.org/10.5438/8gb0-v673).*"

person-works/openalex_get_works_by_person.ipynb

@@ -44,7 +44,7 @@
     "id": "Rt7GUbFcaNxi"
    },
    "source": [
-    "The input for the query is an ORCID URL, e.g. '`https://orcid.org/0000-0003-2499-7741`'"
+    "The input for this notebook is an ORCID URL, e.g. '`https://orcid.org/0000-0003-2499-7741`'"
    ]
   },
   {

person-works/orcid_get_works_by_person.ipynb

@@ -8,7 +8,7 @@
    "source": [
     "### Query ORCID for works authored by a person\n",
     "\n",
-    "This notebook queries the [ORCID API](https://pub.orcid.org/v3.0/) to retrieve works listed in a person's ORCID record. It takes an ORCID URL or iD as input to retrieve the ORCID record of a person and the works listed on it. From the resulting list of works we output all DOIs."
+    "This notebook queries the [ORCID Public API](https://pub.orcid.org/v3.0/) to retrieve works listed in a person's ORCID record. It takes an ORCID URL or iD as input to retrieve the ORCID record of a person and the works listed on it. From the resulting list of works we output all DOIs."
    ]
   },
   {