Added documentation for most modules

Only Spinors and Dirac are missing.

docs/src/ym.md

@@ -0,0 +1,59 @@
+
+# Simulating Yang-Mills on the lattice 
+
+```@docs
+GaugeParm
+YMworkspace
+ztwist
+```
+
+## Gauge actions and forces
+
+Routines to compute the gauge action.
+```@docs
+gauge_action
+```
+
+Routines to compute the force derived from gauge actions. 
+
+```@docs
+force_gauge
+```
+
+### Force field refresh
+
+Algebra fields with **natural indexing** can be randomized.
+```@docs
+randomize!
+```
+
+
+## Basic observables
+
+Some basic observable.
+```@docs
+plaquette
+```
+
+## HMC simulations
+
+### Integrating the EOM
+
+```@docs
+IntrScheme
+leapfrog
+omf2
+omf4
+MD!
+```
+
+### HMC algorithm
+
+```@docs
+hamiltonian
+HMC!
+```
+
+
+
+