Updated paths to be consistent with web page layout for download of .tar.gz...

Updated paths to be consistent with web page layout for download of .tar.gz (Also a few minor editsion in teh advection-diffusion tutorials)

basics/advection-diffusion/basics-advection-diffusion.tex

 \input{tutorial-preamble.tex}
 
-\title{Advection Diffusion Solver}
+\title{Advection Solver}
 
 \begin{document}
 
@@ -29,7 +29,7 @@
 
 \chapter{Introduction}
 
-Welcome to the tutorial of the Advection Diffusion problem using the
+Welcome to the tutorial of the Advection problem using the
 Advection-Diffusion-Reaction (ADR) Solver in the Nektar++ framework.
 This tutorial is aimed to show the main features of the ADR solver in
 a simple manner. If you have not already downloaded and installed
@@ -69,7 +69,7 @@ Prepare for the tutorial. Make sure that you have:
       containing the executables as \inlsh{\$NEK} for the remainder of the
       tutorial.
    \item Downloaded the tutorial files: 
-       \relurl{basics-advection-diffusion.tar.gz}{basics-advection-diffusion}\\
+       \relurl{basics-advection-diffusion.tar.gz}{basics/advection-diffusion}\\
    Unpack it using \inlsh{tar -xzvf basics-advection-diffusion.tar.gz} to produce
    a directory \inlsh{basics-advection-diffusion} with subdirectories
    called \inlsh{tutorial} and \inlsh{complete}.

flow-stability/bfs/flow-stability-bfs.tex

@@ -42,7 +42,7 @@ This tutorial assumes the reader has already completed the previous tutorials in
 Prepare for the tutorial. Make sure that you have:
 \begin{itemize}
    \item Downloaded the tutorial files: 
-       \relurl{flow-stability-bfs.tar.gz}{flow-stability-bfs}\\
+       \relurl{flow-stability-bfs.tar.gz}{flow-stability/bfs}\\
    Unpack it using
    \inlsh{unzip flow-stability-bfs.tar.gz}
    to produce a directory \inlsh{flow-stability-bfs} with subdirectories called \inlsh{tutorial} and

flow-stability/channel/flow-stability-channel.tex

@@ -44,7 +44,7 @@ Prepare for the tutorial. Make sure that you have:
       containing the executables as \inlsh{\$NEK} for the remainder of the
       tutorial.
    \item Downloaded the tutorial files: 
-       \relurl{flow-stability-channel.tar.gz}{flow-stability-channel}\\
+       \relurl{flow-stability-channel.tar.gz}{flow-stability/channel}\\
    Unpack it using
    \inlsh{unzip flow-stability-channel.tar.gz}
    to produce a directory \inlsh{flow-stability-channel} with subdirectories called \inlsh{tutorial} and

flow-stability/cylinder/flow-stability-cylinder.tex

@@ -41,7 +41,7 @@ This tutorial assumes the reader has already completed the previous tutorial in
 Prepare for the tutorial. Make sure that you have:
 \begin{itemize}
    \item Downloaded the tutorial files: 
-       \relurl{flow-stability-cylinder.tar.gz}{flow-stability-cylinder}\\
+       \relurl{flow-stability-cylinder.tar.gz}{flow-stability/cylinder}\\
    Unpack it using
    \inlsh{unzip flow-stability-cylinder.tar.gz}
    to produce a directory \inlsh{flow-stability-cylinder} with subdirectories called \inlsh{tutorial} and