add tools

tools/dice/README.md

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+### Creating the sample x509 root certificate
+
+This folder includes `dice_device_enrollment` tool for Windows, Linux, and OSX.
+
+- Download the tool for your system and run
+- Select `g` option
+- Save the resulting certificate into a file and upload it to AzureIOTCentral (Administration/Device Connection)
+- Go under the certificate settings
+![Settings](cert_settings.png)
+- Grab the Verification Code from the AzureIOTCentral UX and paste it back to `dice_device_enrollment` tool
+- Tool will generate you a challenge response certificate. Save it to another file
+- Click to `Verify` button on the UX and upload the response certificate

tools/dice/linux/README.md

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+### DICE for Linux
+
+`dice_device_enrollment` helps you to generate and verify a sample certificate.
+
+simple run on command line as shown below
+```
+./dice_device_enrollment
+```
+
+If you want to check the integrity of the binary file on Linux;
+```
+shasum -a 256 dice_device_enrollment
+```
+
+Output should be matching to the hash below.
+```
+e3a4ad950f8325b71bda884b9cf95350f05e0f756afd56798bedb5475e7cbcd8
+```

tools/dice/osx/README.md

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+### DICE for Linux
+
+`dice_device_enrollment` helps you to generate and verify a sample certificate.
+
+simple run on command line as shown below
+```
+./dice_device_enrollment
+```
+
+If you want to check the integrity of the binary file on OSX;
+```
+shasum -a 256 dice_device_enrollment
+```
+
+Output should be matching to the hash below.
+```
+426af7a68f43a4a297d383f13bf803856e37f24f26433165f51c102710204baa
+```

tools/dice/windows/README.md

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+### DICE for Windows (compressed)
+
+`dice_device_enrollment` helps you to generate and verify a sample certificate.
+
+simple run on command line as shown below
+```
+dice_device_enrollment.exe
+```
+
+If you want to check the integrity of the binary file on Windows;
+```
+Get-FileHash dice_device_enrollment.zip -Algorithm SHA256
+```
+
+Output should be matching to the hash below.
+```
+b08d4648e7498e9828f8434760230f578fc9e4a336d41118f9c8155dcfb53852
+```