add a new task template

templates/new_yaml_task/README.md

+# Task-name
+
+### Paper
+
+Title: `paper title goes here`
+Abstract: `link to paper PDF or arXiv abstract goes here`
+
+`Short description of paper / benchmark goes here:`
+
+Homepage: `homepage to the benchmark's website goes here, if applicable`
+
+
+### Citation
+
+```
+BibTeX-formatted citation goes here
+```
+
+### Subtasks
+
+List or describe tasks defined in this folder, and their names here:
+* `task_name`: `1-sentence description of what this particular task does`
+* `task_name2`: .....
+
+### Checklist
+
+For adding novel benchmarks/datasets to the library:
+* [ ] Is the task an existing benchmark in the literature?
+  * [ ] Have you referenced the original paper that introduced the task?
+  * [ ] If yes, does the original paper provide a reference implementation? If so, have you checked against the reference implementation and documented how to run such a test?
+  
+
+If other tasks on this dataset are already supported:
+* [ ] Is the "Main" variant of this task clearly denoted?
+* [ ] Have you provided a short sentence in a README on what each new variant adds / evaluates?
+* [ ] Have you noted which, if any, published evaluation setups are matched by this variant?