Helpers.GetChildren summary more clear now
Moved and renamed TagFactory

- TagFactory is now in/Backend
- TagFactory is now named Factory
Factory is now in the appropriate namespace
Modifiers changed

- Factory is now a static class
- Factory.GetITags is now private
DevBuildTag shouldn't have been private
No more nondescript names

A lot of nondescript names are more descriptive now.

- fs -> templateFile
- sr -> templateReader
- td -> tag, data, seedTag
- s -> typeTest, readSymbol, peekSymbol, commitSymbol
GetITagBuilders is now summarized (and renamed)

- The old GetITags name got renamed to GetITagBuilders to match the
change from ITag to ITagBuilder
- The GetITagBuilders method is summarized now.
- DevBuildTag now has a TODO to remove it.
Factory.Build doesn't call DevBuildTag now

The Factory.Build method is no longer dependent on the DevBuildTag
method. It does duplicate DevBuildTag's functionality, but DevBuildTag
will be removed soon and the duplication will go away.
Commented out, obsolete method deleted

The old, commented out implementation of Build is obsolete, so it's gone
now.
Renamed BlockTag -> TemplateTag
BlockTag is now TemplateTag

The BlockTag is now a TemplateTag.
More nondescript names gone