VSCode Rest Client 0.26.1

This version fixes the curl command, so that you can make HTTP requests like the following:

curl -I https://google.com/ \
    -H "User-Agent: VSCode Rest Client using curl"

To install:

1. Download the rest-client-0.26.1.vsix file to a local directory
2. Open the command palette in VSCode, e.g. CTRL+SHIFT+P on Windows/Linux, and type "vsix"
3. Choose the command "Extensions: Install from VSIX...", and select the file downloaded in step 1