Standardize the include format

[JoshuaSBrown]

In response to this issue

[codecov]

Codecov Report

Merging #531 into master will decrease coverage by 0.0%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #531     +/-   ##
========================================
- Coverage    51.4%   51.4%   -0.1%     
========================================
  Files         128     128             
  Lines        6164    6165      +1     
========================================
  Hits         3169    3169             
- Misses       2995    2996      +1     

Flag	Coverage Δ
#gcc	51.4% <ø> (-0.1%)	⬇️

Impacted Files	Coverage Δ
include/votca/csg/basebead.h	82.3% <ø> (ø)
include/votca/csg/bead.h	56.0% <ø> (ø)
include/votca/csg/beadlist.h	50.0% <ø> (ø)
include/votca/csg/beadmotif.h	100.0% <ø> (ø)
include/votca/csg/beadmotifalgorithms.h	100.0% <ø> (ø)
include/votca/csg/beadmotifconnector.h	100.0% <ø> (ø)
include/votca/csg/beadpair.h	66.6% <ø> (ø)
include/votca/csg/beadstructure.h	100.0% <ø> (ø)
include/votca/csg/beadtriple.h	90.0% <ø> (ø)
include/votca/csg/boundarycondition.h	50.0% <ø> (ø)
... and 27 more

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