Update Docs

Author: cwarden

docs/batchforce.md

@@ -23,16 +23,23 @@ Use Bulk API to update Salesforce records
 	- escapeUnicode: escapes characters using Unicode escape sequences
 	  like Apex's String.escapeUnicode method
 	- base64: base-64 encodes input
+	- md5: md5 hash of string
+	- getSet: set key to value, returning previous value for key
 	- compareAndSet: check if key maps to value; if key doesn't exist, set it to
 	  value (return true unless key already exists with different value)
 	- changeValue: update value associated with key (returns true unless the key
 	  already exists and the value is unchanged)
 	- incr: increments the number stored at key by one. set to 1 if not set.
+	- clone: create a copy of the record
 
 	The + and - operators can be used to add, update, or remove fields on the
 	record object.  For example:
 	record + {RecordTypeId: apex.myRecordTypeId} - "RecordType.Name"
 
+	If creating multiple records from a source record, use clone to avoid mutating
+	the same object repeatedly.  For example:
+	1..100 | map(clone(record) + {Name: "Record " + string(#)})
+
 	Additional context to be provided to the Expr expression by passing the
 	--context parameter containining anonymous apex to execute before the
 	records are queried.  Each apex variable defined will be available within