Entirely reworked text handling pipeline

This breaks the text pipeline into the following pieces:

- input parsing (split known bracketed phoneme sections out first)

- normalization (fix spacing, numbers, abbreviations, etc.)

- phonetization (do CMUdict lookup or g2p prediction)

- sequencing (convert the symbolic representation to integer
  representation)

Each "pipeline" can have a unique combination of operations for each of
these pipeline steps.

This will grow over time.

tts/README.md

@@ -13,6 +13,13 @@ The following files are entrypoints and an essential part of FakeYou.com functio
    files).
 
 
+To Run Tests
+------------
+
+```
+pytest text/
+```
+
 Vocodes Server Parameters
 -------------------------