[PULL] -purgetx option

[m0Ray]

https://github.com/bitcoin/bitcoin/pull/256

Added -purgetx command line option.
When used, purges all transactions from wallet.dat and forces a rescan.
Useful for solving problems with invalid transactions stored in
wallet.dat (for example, after wallet.dat manipulations).

Corrected russian translation.

[Pieter Wuille]

This is a useful and simple last-resort solution, but it may be dangerous, as it also removes (valid) unconfirmed transactions and meta-data like source account information.

Translations are very welcome, but can you do them in a separate commit?

[m0Ray]

Translations are very welcome, but can you do them in a separate commit?

Hope I can. Still trying to understand GIT ideology.
The purgetx pull was done following step-by-step instructions.