message: Add missing flags to tfdbg doc chart
  * Add missing flags to tfdbg doc chart
  Some command flags for tfdbg weren't listed in the doc
  chart. This commit adds the ones that are missing.
  * Remove -n from pf
diff: @@ -149,6 +149,7 @@ Try the following commands at the `tfdbg>` prompt (referencing the code at
  | | `pt <tensor>[slicing]` | Print a subarray of tensor, using [numpy](http://www.numpy.org/)-style array slicing. | `pt hidden/Relu:0[0:50,:]` |
  | | `-a` | Print the entirety of a large tensor, without using ellipses. (May take a long time for large tensors.) | `pt -a hidden/Relu:0[0:50,:]` |
  | | `-r <range>` | Highlight elements falling into specified numerical range. Multiple ranges can be used in conjunction. | `pt hidden/Relu:0 -a -r [[-inf,-1],[1,inf]]` |
  +| | `-n <number>` | Print dump corresponding to specified 0-based dump number. Required for tensors with multiple dumps. | `pt -n 0 hidden/Relu:0` |
  | | `-s` | Include a summary of the numeric values of the tensor (applicable only to non-empty tensors with Boolean and numeric types such as `int*` and `float*`.) | `pt -s hidden/Relu:0[0:50,:]` |
  | **`@[coordinates]`** | | Navigate to specified element in `pt` output. | `@[10,0]` or `@10,0` |
  | **`/regex`** | | [less](https://linux.die.net/man/1/less)-style search for given regular expression. | `/inf` |
  @@ -166,10 +167,12 @@ Try the following commands at the `tfdbg>` prompt (referencing the code at
  | | `-r` | List the inputs to node, recursively (the input tree.) | `li -r hidden/Relu:0` |
  | | `-d <max_depth>` | Limit recursion depth under the `-r` mode. | `li -r -d 3 hidden/Relu:0` |
  | | `-c` | Include control inputs. | `li -c -r hidden/Relu:0` |
  +| | `-t` | Show op types of input nodes. | `li -t -r hidden/Relu:0` |
  | **`lo`** | | **List output recipients of node** | |
  | | `-r` | List the output recipients of node, recursively (the output tree.) | `lo -r hidden/Relu:0` |
  | | `-d <max_depth>` | Limit recursion depth under the `-r` mode. | `lo -r -d 3 hidden/Relu:0` |
  | | `-c` | Include recipients via control edges. | `lo -c -r hidden/Relu:0` |
  +| | `-t` | Show op types of recipient nodes. | `lo -t -r hidden/Relu:0` |
  | **`ls`** | | **List Python source files involved in node creation.** | |
  | | `-p <path_pattern>` | Limit output to source files matching given regular-expression path pattern. | `ls -p .*debug_mnist.*` |
  | | `-n` | Limit output to node names matching given regular-expression pattern. | `ls -n Softmax.*` |
  