Created Standard assimilators (markdown)

Standard-assimilators.md

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+## The sample assimilator
+
+BOINC includes a sample assimilator, **sample_assimilator**.
+It does the following:
+
+* For successful workunits, it writes the canonical instance's output files to the directory **PROJECT/sample_results/**.
+  If there is only one output file it is named WU_NAME.
+  If there are more than one they are named WU_NAME_0, WU_NAME_1, etc.
+  If there are no output files, an empty file WU_NAME_no_output_files is created.
+* If the workunit failed (e.g., too many errors) it appends a line to **sample_results/errors**
+  containing the workunit name and the error code.
+
+The sample assimilator can be used as a placeholder while you are developing your application.
+In some cases you may be able to use it in production.