Fixed readme image sizes and references (#18)

* Update README.md

Updated image references to point to pngs

* Delete EcosystemLayers.jpg

* Delete LibraryComponents.jpg

* Add files via upload

* Delete EcosystemLayers.png

* Delete LibraryComponents.png

* Create temp.text

* Add files via upload

* Delete temp.text

* Update README.md

Author: mtwo

README.md

@@ -136,13 +136,13 @@ allows applications to easily get access to their own data in-process.
 * Library MUST support the [TraceContext][TraceContextSpecs] format for Trace and Tags components.
 * Binary encoding is defined [here](https://github.com/census-instrumentation/opencensus-specs/blob/master/encodings/BinaryEncoding.md)
 
-[EcosystemLayers]: https://github.com/census-instrumentation/opencensus-specs/blob/master/drawings/EcosystemLayers.jpg "Ecosystem Layer"
+[EcosystemLayers]: /drawings/EcosystemLayers.png "Ecosystem Layer"
 [DapperPaper]: https://research.google.com/pubs/pub36356.html
 [goContext]: https://golang.org/pkg/context
 [gRPCContext]: https://github.com/grpc/grpc-java/blob/master/context/src/main/java/io/grpc/Context.java
-[LibraryComponents]: https://github.com/census-instrumentation/opencensus-specs/blob/master/drawings/LibraryComponents.jpg "OpenCensus Library Components"
+[LibraryComponents]: /drawings/LibraryComponents.png "OpenCensus Library Components"
 [NamespaceAndPackage]: https://github.com/census-instrumentation/opencensus-specs/blob/master/NamespaceAndPackage.md
 [RFC2119]: https://www.ietf.org/rfc/rfc2119.txt
 [TraceAPI]: https://github.com/census-instrumentation/opencensus-specs/blob/master/trace/README.md
 [TraceContextSpecs]: https://github.com/TraceContext/tracecontext-spec
-[TraceDataModel]: https://github.com/census-instrumentation/opencensus-proto/blob/master/trace/trace.proto
+[TraceDataModel]: https://github.com/census-instrumentation/opencensus-proto/blob/master/trace/trace.proto