fix typos

Github: Closes #128
Signed-off-by: Michael Niedermayer <[email protected]>

Author: retokromer

README.md

@@ -2,11 +2,11 @@
 
 ## Introduction
 
-This repository manages the development of specification documents for FFV1, a lossless intra-frame video codec. The goals of this specification effort are defined within the charter of the [cellar working group](https://datatracker.ietf.org/wg/cellar/charter/) of the [Internet Engineering Task Force](https://ietf.org/). Information within this repository should be considered in draft form. The most recent official version of the specificiation for FFV1 may be found at https://datatracker.ietf.org/doc/draft-ietf-cellar-ffv1/. An HTML rendering is also available via https://ffmpeg.org/~michael/ffv1.html.
+This repository manages the development of specification documents for FFV1, a lossless intra-frame video codec. The goals of this specification effort are defined within the charter of the [cellar working group](https://datatracker.ietf.org/wg/cellar/charter/) of the [Internet Engineering Task Force](https://ietf.org/). Information within this repository should be considered in draft form. The most recent official version of the specification for FFV1 may be found at https://datatracker.ietf.org/doc/draft-ietf-cellar-ffv1/. An HTML rendering is also available via https://ffmpeg.org/~michael/ffv1.html.
 
 ## Formatting
 
-The FFV1 specification was iniitally written in lyx. In July 2015 the formatting of the specification was transitioned to Markdown. Propering PDF and HTML rendering has been tested with requires pandoc version 1.13.2.1 and higher.
+The FFV1 specification was initially written in lyx. In July 2015 the formatting of the specification was transitioned to Markdown. Propering PDF and HTML rendering has been tested with requires pandoc version 1.13.2.1 and higher.
 
 The Markdown version of the FFV1 specification may also be converted into XML, HTML, and text formats as an IETF RFC draft. Producing the RFC formats requires mmark version 1.3.4 or higher and xml2rfc version 2.5.1 or higher.