TOC Depth filter function added

Add options to TOC to only show selected depth of titles ; ie pass 1,3
arguments to only show titles depth 1 to titles depth 3
Plus now you can have two+ TOC on your document, each different
Re-indent with spaces TOC Depth filter

Travis said spaces, not tab. Meh.
added clone, delete, replace block #165

Because I needed to clone, delete and replace some tables, I added those
functions.
Merge branch 'develop' of https://github.com/diego-vieira/PHPWord into #191-diego-vieira
Merge branch 'master' of https://github.com/Pyreweb/PHPWord into #189-pyreweb
Merge remote-tracking branch 'upstream/develop' into #189-pyreweb
Update changelog and documentation
Update TOC tests
Merge branch 'develop' into #160-element-container