CMakeLists/README/DOC - updates and fixes (#43)

* CMakeLists/README/DOC - updates and fixes

* Fix few typos in the sample code in doc

* Add a sample code snippet for decoding a batch of jpeg images

docker/rocJPEG-on-ubuntu20.dockerfile

@@ -7,7 +7,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get -y install gcc g++ cmake pkg-config g
 
 # install ROCm
 RUN DEBIAN_FRONTEND=noninteractive apt-get -y install initramfs-tools libnuma-dev wget keyboard-configuration && \
-        wget https://repo.radeon.com/amdgpu-install/6.3/ubuntu/focal/amdgpu-install_6.3.60100-1_all.deb && \
+        wget https://repo.radeon.com/amdgpu-install/6.3/ubuntu/focal/amdgpu-install_6.3.60300-1_all.deb && \
         sudo apt-get install ./amdgpu-install_6.3.60100-1_all.deb && \
         sudo amdgpu-install -y --usecase=rocm
 

docker/rocJPEG-on-ubuntu22.dockerfile

@@ -7,7 +7,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get -y install gcc g++ cmake pkg-config g
 
 # install ROCm
 RUN DEBIAN_FRONTEND=noninteractive apt-get -y install initramfs-tools libnuma-dev wget keyboard-configuration && \
-        wget https://repo.radeon.com/amdgpu-install/6.3/ubuntu/jammy/amdgpu-install_6.3.60100-1_all.deb && \
+        wget https://repo.radeon.com/amdgpu-install/6.3/ubuntu/jammy/amdgpu-install_6.3.60300-1_all.deb && \
         sudo apt-get install ./amdgpu-install_6.3.60100-1_all.deb && \
         sudo amdgpu-install -y --usecase=rocm