add sprunge plugin

plugins/sprunge/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2014 Paul Joannon
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

plugins/sprunge/README.md

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+# fish-sprunge
+
+## Usage
+
+Place (or link) the *.fish* file under your **fish-shell** directory (typically `~/.config/fish/`) in the `functions` subdir.  
+
+You can then sprunge:
+
+ * a file from a redirection: `sprunge < README.md`
+ * a file from an argument: `sprunge README.md`
+ * the result of a command through a pipe: `cat README.md | sprunge`
+ * some arbitrary text: `sprunge "I <3 paulloz"`

plugins/sprunge/sprunge.fish

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+# Just a sprunge wrapper for fish-shell
+# Paul Joannon (paulloz) <paul.joannon@gmail.com>
+# https://github.com/Paulloz/fish-sprunge
+# Based on oh-my-zsh's sprunge plugin
+
+function sprunge
+    if isatty stdin
+        if [ (count $argv) -gt 0 ]
+            if [ -f $argv ]
+                cat $argv
+            else
+                echo $argv
+            end | curl -F 'sprunge=<-' http://sprunge.us
+        else
+            echo -e "Usage:
+    * sprunge < README.md
+    * sprunge README.md
+    * cat README.md | sprunge
+    * sprunge "I \<3 paulloz""
+        end
+    else
+        curl -F 'sprunge=<-' http://sprunge.us
+    end
+end