Add plugin release semi-automatic script

We want to be able to release versions in a faster way then we do by now.

Closes #20.

Author: dadoonet

README.md

@@ -5,12 +5,12 @@ The Stempel (Polish) Analysis plugin integrates Lucene stempel (polish) analysis
 
 In order to install the plugin, simply run: `bin/plugin -install elasticsearch/elasticsearch-analysis-stempel/2.0.0.RC2`.
 
-For 1.0.x elasticsearch versions, look at [master branch](https://github.com/elasticsearch/elasticsearch-analysis-stempel/tree/master).
-For 0.90.x elasticsearch versions, look at [1.x branch](https://github.com/elasticsearch/elasticsearch-analysis-stempel/tree/1.x).
+* For 1.0.x elasticsearch versions, look at [master branch](https://github.com/elasticsearch/elasticsearch-analysis-stempel/tree/master).
+* For 0.90.x elasticsearch versions, look at [1.x branch](https://github.com/elasticsearch/elasticsearch-analysis-stempel/tree/1.x).
 
 |   Stempel Analysis Plugin  |    elasticsearch    | Release date |
 |----------------------------|---------------------|:------------:|
-| 2.0.0-SNAPSHOT (master)    | 1.0.0.RC1 -> master |              |
+| 2.0.0-SNAPSHOT             | 1.0.0.RC1 -> master |  XXXX-XX-XX  |
 | 2.0.0.RC2                  | 1.0.0.RC1 -> master |  2014-02-05  |
 | 2.0.0.RC1                  | 1.0.0.RC1 -> master |  2014-01-15  |