Restructure/rename package, add unit test

Author: yuanzhou

schema-templating/schema_template_transformer.py

@@ -3,7 +3,8 @@ Flask==1.1.2
 neo4j==4.2.1
 prov==2.0.0
 Werkzeug==1.0.1
-nose2==0.10.0
+
+# For schema templating
 nested-lookup==0.2.22
 
 # The commons package requires requests>=2.22.0 and PyYAML>=5.3.1
@@ -13,3 +14,6 @@ PyYAML==5.4.1
 # The branch name of commons to be used during image build
 # Default is master branch specified in docker-compose.yml if not set
 git+git://github.com/hubmapconsortium/commons.git@${COMMONS_BRANCH}#egg=hubmap-commons
+
+# For unit test
+nose2==0.10.0

src/requirements.txt

@@ -12,15 +12,8 @@ If that yaml file also has X-replace tags, this process will repeat until all re
 is output as a new yaml file called my-spec.yaml. If build-schema.sh does not receive precisely 1 argument, an error is thrown.
 If the file given as an argument does not exist, an error is also thrown.
 
-### Usage:
-````angular2html
+### Usage
+
+````
 ./build-schema.sh example-yaml-templates/search-api-spec-TEMPLATE.yaml
 ````
-
-## A note on schema_template_transformer.py
-
-This python script is deprecated. It had similar functionality to general_schema_template_transformer.py however it only could
-replace portions of a single file by retrieving enumerated lists from an external yaml file by url. It is kept in this directory
-only for context and record keeping purposes. 
-
-