use images from git repo

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@@ -25,7 +25,7 @@ gmsh, getdp">
 
 <h1>Open Numerical Engineering LABoratory</h1>
 
-<div><span style="white-space:nowrap"><img width="25%" src="http://onelab.info/files/inductor/screenshot2_512.png"/><img width="25%" src="http://onelab.info/files/magnetometer/screenshot1_512.png"/><img width="25%" src="http://onelab.info/files/machines/screenshot2_512.png"/><img width="25%" src="http://onelab.info/files/indheat/screenshot1_512.png"/></span><br><span style="white-space:nowrap"><img width="25%" src="http://onelab.info/files/waveguides/screenshot2_512.png"/><img width="25%" src="http://onelab.info/files/relay/screenshot2_512.png"/><img width="25%" src="http://onelab.info/files/bloch_periodic_waveguides/screenshot1_512.png"/><img width="25%" src="http://onelab.info/files/acoustic_scattering/screenshot2_512.png"/></span></div>
+<div><span style="white-space:nowrap"><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/inductor/screenshot2_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/magnetometer/screenshot1_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/machines/screenshot2_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/indheat/screenshot1_512.png"/></span><br><span style="white-space:nowrap"><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/waveguides/screenshot2_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/relay/screenshot2_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/bloch_periodic_waveguides/screenshot1_512.png"/><img width="25%" src="http://gitlab.onelab.info/getdp/getdp/raw/master/benchmarks/acoustic_scattering/screenshot2_512.png"/></span></div>
 
 <p>
 ONELAB is an open-source, lightweight interface to finite element software. It