added clone, delete, replace block

[dv336699]

Because I needed to clone, delete and replace some tables, I added those
functions.

[ivanlanin]

Thanks @diego-vieira. Can you please point your pull request to the develop branch? Version 0.8 is stable and we won't make any more changes to it. We're moving to version 0.9 and the repository for that version is the develop branch.

[Progi1984]

Thanks @diego-vieira for this PR. Could you add some unit tests, too ?

[dv336699]

@ivanlanin oh, didn't know, sorry.
@Progi1984 my bad, will do.

[ivanlanin]

@diego-vieira I'll help you merge this, but can you please push the docx templates? I can't test the samples without those files. Thanks.

[ivanlanin]

Hi @diego-vieira. Do you still want to merge this pull? Thanks.

[dv336699]

Hi @ivanlanin sorry for the delay, too much stuff going on.
I'll do as requested.

[ivanlanin]

No problem. Thanks.

[dv336699]

@ivanlanin really sorry for the delay, I'm going out of the country next week and had lots of stuff to do.
Unfortunately I didn't had time to write the tests (sorry!)

Here is the new PR targeting develop.
#191

Thank you!