add readme.md
does not compile
distribution now working, need to compare to i(r)
WIP
compiles
analytical variance, wrong output
corresponding example
print out 20 first profiles to another file
functions to test approximate / exact calculation of the autocorrelation
Revert "functions to test approximate / exact calculation of the autocorrelation"

This reverts commit 0cbc24bade3c9a4246c12dc018f70abbe49caec0 as these tests are
not needed because they pass.
an attempt at an inverse gamma mover, untested.
removed inverse gamma mover
add saxs profile_variance.cpp

put in isd because of eigen dependency
modify profile examples
added numerical scheme
move numerical variance computation to header file
compare contributions to numerical and analytical variance
analyze contributions at each q
disable c++11 for the time being
remove BivariateRadialDistributionFunction