Layout changes and typo fixes

_pages/docs/comm_interfaces.md

@@ -24,15 +24,15 @@ For the MPI interfaces the optional `-auto` suffix instructs the `configure` scr
 
 The following options can be use with the `--enable-shm=` option to target different shared memory behaviours (default `shmopen`):
 
-| `<shm>`       | Description                                                       |
-| ------------- | ----------------------------------------------------------------- |
-| `shmnone`     | uses anonymous spaces, use only for 1 MPI rank per node           |
-| `shmopen`     | uses `shm_open` to allocate a shared memory space for inter socket communications. It used a unique file name in `/dev/shm` associated to the user. |
-| `hugetlbfs`   | optional [libhugetlbfs](https://github.com/libhugetlbfs/libhugetlbfs) support to map the shared memory allocation into huge 2M pages                |
+| `<shm>`       | Description                                                                                                                                      |
+| ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `shmnone`     | uses anonymous spaces, use only for 1 MPI rank per node                                                                                          |
+| `shmopen`     | uses `shm_open` to allocate a shared memory space for inter socket communications. Uses a unique file name in `/dev/shm` associated to the user. |
+| `hugetlbfs`   | optional [libhugetlbfs](https://github.com/libhugetlbfs/libhugetlbfs) support to map the shared memory allocation into huge 2M pages             |
 
 
 ### Other flags
 
-`--enable-shmpath=<path>`  to select the sharem memory map base path for [libhugetlbfs](https://github.com/libhugetlbfs/libhugetlbfs).
+`--enable-shmpath=<path>`  to select the shared memory map base path for [libhugetlbfs](https://github.com/libhugetlbfs/libhugetlbfs).
 
 {% include paginator.html %}

_pages/docs/running_knl.md

@@ -65,8 +65,8 @@ Beside the generic implementation using stencils, GRID has optimised version of
 
 Flags at runtime can be used for the optimised paths
 
-| Flag    | Description                            |
-| ----------- | -------------------------------------- |
+| Flag                  | Description                                                           |
+| --------------------- | --------------------------------------------------------------------- |
 | `--dslash-generic`  	| This is the default option and used the implementation with stencils 	|
 | `--dslash-unroll`   	| This explicitly unroll the colour loops. It is tied to `Nc=3`        	|
 | `--dslash-asm`      	| This is specific for AVX512-F architectures and `Nc=3`               	|

_pages/docs/using_hmc.md

@@ -14,12 +14,18 @@ Using HMC in Grid version 0.7.0
 These are the instructions to use the Generalised HMC on Grid version 0.7.0.
 Disclaimer: GRID is still under active development so any information provided here can be changed in future releases.
 
-General
+Introduction
 =======
 
-$$ \mathbf{X}\_{n,p} = \mathbf{A}\_{n,k} \mathbf{B}\_{k,p} $$
+The general problem is to generate a Markov Chain distributed according to the action $$S(\psi)$$ in order to compute observables expectaction values.
+
+$$ \langle O \rangle = \frac{1}{Z} \int O e^{-S(\psi)} D\psi $$ 
+
+The Hybrid Monte Carlo approach is to introduce ficticious random momenta to construct an Hamiltonian $$H(\psi)$$ and generate 
+new configurations by integrating the corresponding Hamilton equations.
+
+$$H(\psi) = \frac{1}{2} P^2 + S(\psi)$$
 
-$$ \langle O \rangle = \int O e^{-S(\psi)} d\psi $$ 
 
 Command line options
 ====================

_sass/_masthead.scss

@@ -14,7 +14,10 @@
   &__inner-wrap {
     @include container;
     @include clearfix;
-    padding: 1em 1em 1em;
+    padding-top: 0.5em;
+    padding-bottom: 0.5em;
+    padding-left: 1em;
+    padding-right: 1em;
     font-family: $sans-serif-narrow;
 
     @include breakpoint($x-large) {

_sass/_page.scss

@@ -117,7 +117,7 @@
   &--overlay {
     position: relative;
     margin-bottom: 2em;
-    padding: 3em 0;
+    padding: 2em 0;
     @include clearfix;
     background-size: cover;
     background-repeat: no-repeat;