implement an interactive bar for users to zoom in and out the mesh physical model.
merge the dev trunk
add mesh points for 1D Sod tube model
refactor and rename the variable
add diaphragm, use variable model_point_number
tweak the looking
switch to show the diaphragm and mesh or not
add checkbox, updating graph
add tube radius slider, and make the color of the mesh points be green
more text in sodtube1d.ipynb
init sodtube1d-slides.ipynb
packages/modules should not have shebangs. remove them.
use the lastest name convention, rename gasdyn to be gas

--HG--
rename : sandbox/gasdyn/tube/run.py => sandbox/gas/tube/run.py
rename : sandbox/gasdyn/tube/sodtube1d-slides.ipynb => sandbox/gas/tube/sodtube1d-slides.ipynb
rename : sandbox/gasdyn/tube/sodtube1d.ipynb => sandbox/gas/tube/sodtube1d.ipynb
rename : sandbox/gasdyn/tube/sodtube1d/__init__.py => sandbox/gas/tube/sodtube1d/__init__.py
rename : sandbox/gasdyn/tube/sodtube1d/generator_mesh.py => sandbox/gas/tube/sodtube1d/generator_mesh.py
rename : sandbox/gasdyn/tube/sodtube1d/handler_data.py => sandbox/gas/tube/sodtube1d/handler_data.py
rename : sandbox/gasdyn/tube/sodtube1d/handler_plot.py => sandbox/gas/tube/sodtube1d/handler_plot.py
rename : sandbox/gasdyn/tube/sodtube1d/solver_analytic.py => sandbox/gas/tube/sodtube1d/solver_analytic.py
rename : sandbox/gasdyn/tube/sodtube1d/solver_cese.py => sandbox/gas/tube/sodtube1d/solver_cese.py
rename : sandbox/gasdyn/tube/sodtube1d/solver_porting.py => sandbox/gas/tube/sodtube1d/solver_porting.py
add more text to sandbox/gas/tube/sodtube1d.ipynb
plot the mesh to demo the grids in space and time in ipynb
add _get_cut_mesh_by_xbound and apply it
update nb for new method show_mesh_in_space_time_ipynb