Merge branch 'remove_gui' into 'master'

Remove GUI module, superseded by OnlineMonitor

See merge request simonspa/corryvreckan!39
8 jobs for v0.7 in 4 minutes and 49 seconds (queued for 2 seconds)
latest
Status Name Job ID Coverage
  Compile
passed cmp:cc7-gcc #1455001
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00:01:54

passed cmp:cc7-llvm #1455002
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passed cmp:mac1013-clang #1455003
mac

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passed cmp:slc6-gcc #1454999
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passed cmp:slc6-llvm #1455000
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00:01:32

 
  Format
passed fmt:centos7-llvm-format #1455005
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00:02:07

passed fmt:slc6-llvm-format #1455004
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  Documentation
passed cmp:usermanual #1455006
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