add Transactions to Posh version
some bug fixes.

1st new tool: openebConcat: something like a tar archive. plain and straight forward: concats files with some bytes of metadata. at the end of the file there is a SQLite DB stored that contains information about what files have been added (but not their position). For quicker restart.

2nd new tool: openebSplit: Splitting this archives into the sources files.
Merge branch 'master' of https://github.com/ikarstein/openeb