TalkNet 1.x
ping @stasbel   This pull request **introduces 2 alerts** when merging bb66ad0cb949eab426b3fd510525e4edcf0fdace into fc4017a08db4cf2aaad2288dd158e9c287f7107a - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-01fe481edaf7d6ac977150b56a2b758a568a4873)

**new alerts:**

* 1 for Unused import
* 1 for Wrong name for an argument in a class instantiation got some arch mismatches with my pretrained models
going to retrain in following days This pull request **introduces 2 alerts** when merging bb66ad0cb949eab426b3fd510525e4edcf0fdace into d7ad10435e97024c7c9fdbdd4228e0011dc9e432 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-40377bb52a1892ca08cd4ac249299434aa2636b2)

**new alerts:**

* 1 for Unused import
* 1 for Wrong name for an argument in a class instantiation This pull request **introduces 2 alerts** when merging bb66ad0cb949eab426b3fd510525e4edcf0fdace into db5a787f460d67f0cd89b400cf81826fa2cc9ed6 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-6a685435f18b4d1006d383dafd209b308356040a)

**new alerts:**

* 1 for Unused import
* 1 for Wrong name for an argument in a class instantiation This is not going to RC1. Code freeze was far too long ago Please top resolving my comments by yourself
TODOs:
- [x] Pitch predictor (with available models)
- [x] Spect prediction new things (with available models)
- [x] Durs predictor (with available models)
- [x] LJSpeech with durs and f0
- [x] 3x pretrained models (no need)
- [x] Documentation
- [x] Update TTS Notebook inference

Signed-off-by: Stanislav Beliaev <stasbelyaev96@gmail.com>