Add tasks for all the new languages

Task/Documentation/Gri/documentation-1.gri

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+`My Hello Message'
+Print a greeting to the user.
+This is only a short greeting.
+{
+    show "hello"
+}

Task/Documentation/Gri/documentation-2.gri

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+help My Hello Message

Task/Documentation/Nim/documentation.nim

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+## Nim directly supports documentation using comments that start with two
+## hashes (##). To create the documentation run ``nim doc file.nim``.
+## ``nim doc2 file.nim`` is the same, but run after semantic checking, which
+## allows it to process macros and output more information.
+##
+## These are the comments for the entire module.  We can have long descriptions
+## here. Syntax is reStructuredText. Only exported symbols (*) get
+## documentation created for them.
+##
+## Here comes a code block inside our documentation:
+##
+## .. code-block:: nim
+##   var inputStrings : seq[string]
+##   newSeq(inputStrings, 3)
+##   inputStrings[0] = "The fourth"
+##   inputStrings[1] = "assignment"
+##   inputStrings[2] = "would crash"
+##   #inputStrings[3] = "out of bounds"
+
+type TPerson* = object
+  ## This type contains a description of a person
+  name: string
+  age: int
+
+var numValues*: int ## \
+  ## `numValues` stores the number of values
+
+proc helloWorld*(times: int) =
+  ## A useful procedure
+  for i in 1..times:
+    echo "hello world"

Task/Documentation/Ring/documentation.ring

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+/*
+Multiply two numbers
+n1: an integer.
+n2: an integer.
+returns product of n1 and n2
+ */
+see mult(3, 5) + nl
+func mult n1, n2
+     return n1*n2

Task/Documentation/Swift/documentation.swift

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+/**
+ Adds two numbers
+ :param: a an integer.
+ :param: b another integer.
+ :returns: the sum of a and b
+ */
+func add(a: Int, b: Int) -> Int {
+    return a + b
+}