Update README for generalized where* functions

Author: md5

README.md

@@ -134,11 +134,11 @@ Within those templates, the object emitted by docker-gen will have [this structu
 * *`split $string $sep`*: Splits `$string` into a slice of substrings delimited by `$sep`. Alias for [`strings.Split`](http://golang.org/pkg/strings/#Split)
 * *`trimPrefix $prefix $string`*: If `$prefix` is a prefix of `$string`, return `$string` with `$prefix` trimmed from the beginning. Otherwise, return `$string` unchanged.
 * *`trimSuffix $suffix $string`*: If `$suffix` is a suffix of `$string`, return `$string` with `$suffix` trimmed from the end. Otherwise, return `$string` unchanged.
-* *`where $entries $fieldPath $value`*: Filters an array or slice based on the values of a field path expression `$fieldPath`. A field path expression is a dot-delimited list of map keys or struct member names specifying the path from container to a nested value. Returns an array of items having that value.
-* *`whereExist $containers $fieldPath`*: Like `where`, but returns only containers where `$fieldPath` exists (is not nil).
-* *`whereNotExist $containers $fieldPath`*: Like `where`, but returns only containers where `$fieldPath` does not exist (is nil).
-* *`whereAny $containers $fieldPath $sep $values`*: Like `where`, but the string value specified by `$fieldPath` is first split by `$sep` into a list of strings. The comparison value is a string slice with possible matches. Returns containers which OR intersect these values.
-* *`whereAll $containers $fieldPath $sep $values`*: Like `whereAny`, except all `$values` must exist in the `$fieldPath`.
+* *`where $items $fieldPath $value`*: Filters an array or slice based on the values of a field path expression `$fieldPath`. A field path expression is a dot-delimited list of map keys or struct member names specifying the path from container to a nested value. Returns an array of items having that value.
+* *`whereExist $items $fieldPath`*: Like `where`, but returns only items where `$fieldPath` exists (is not nil).
+* *`whereNotExist $items $fieldPath`*: Like `where`, but returns only items where `$fieldPath` does not exist (is nil).
+* *`whereAny $items $fieldPath $sep $values`*: Like `where`, but the string value specified by `$fieldPath` is first split by `$sep` into a list of strings. The comparison value is a string slice with possible matches. Returns items which OR intersect these values.
+* *`whereAll $items $fieldPath $sep $values`*: Like `whereAny`, except all `$values` must exist in the `$fieldPath`.
 
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