Genius-pig opened a new pull request #389: [IOTDB-165][TsFile] Delete a current 
version and add a number version
URL: https://github.com/apache/incubator-iotdb/pull/389
 
 
   According to this 
[issue](https://issues.apache.org/jira/projects/IOTDB/issues/IOTDB-165), I 
implement 1, 2, delete a current version which I think is useless, and I will 
add an exception for TsFile reader in a few days. But discussion of the 
compatibility between iotdb and TsFile is still continuing.
   
   > 1. Change current TsFile magic number from 12 bytes to: 6 bytes magic 
string ("TsFile") + 6 bytes version number ({"000001", "000002", ""000003"}) 
("v0.8.0" is the first version (we treat it as "000000")).We update the TsFile 
version unless the format is incompatible.
   
   >2. The tail of a TsFile only has "TsFile" magic string, without the version.

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