Rename readme to reflect use of markdown after addition of distribute…

…d lzo indexer docs.

README → README.md

@@ -42,11 +42,11 @@ At this point, you should also be able to use the indexer to index lzo files in
 
 - index it in-process via:
 
-hadoop jar /path/to/your/hadoop-lzo.jar com.hadoop.compression.lzo.LzoIndexer big_file.lzo
+        hadoop jar /path/to/your/hadoop-lzo.jar com.hadoop.compression.lzo.LzoIndexer big_file.lzo
 
 - index it in a map-reduce job via:
 
-hadoop jar /path/to/your/hadoop-lzo.jar com.hadoop.compression.lzo.DistributedLzoIndexer big_file.lzo
+        hadoop jar /path/to/your/hadoop-lzo.jar com.hadoop.compression.lzo.DistributedLzoIndexer big_file.lzo
 
 Either way, after 10-20 seconds there will be a file named big_file.lzo.index.  The newly-created index file tells the LzoTextInputFormat's getSplits function how to break the LZO file into splits that can be decompressed and processed in parallel.  Alternatively, if you specify a directory instead of a filename, both indexers will recursively walk the directory structure looking for .lzo files, indexing any that do not already have corresponding .lzo.index files.