Update Buildind.doc

Small documentation fix: wrong package name provided for development library libfeel++ (libfeel-dev -> libfeel++-dev)
Rename Buildind.doc to Building.doc

Renamed Buildind.doc to Building.doc
fix
Merge branch 'develop' of https://github.com/feelpp/feelpp into develop
add min2, i.e. the minimum true error is reached for a parameter mu, so the associated estimated error is also computed for this parameter mu and then the ratio estimated_error/true_error is done with the same mu
fix
fix
Merge branch 'develop' of https://github.com/feelpp/feelpp into develop
Update publish.sh
fix
Update test_functionallinearfree.cpp

The error given by ctest was: 
test_functionallinearfree.cpp(212): error in "test_2": absolute value of math::abs(norm_sum_composite - norm_sum_functional){7.1054273576010019e-15} exceeds 1.0000000000000001e-15
test_functionallinearfree.cpp(213): error in "test_2": absolute value of math::abs(norm_sum_compositefree - norm_sum_functionalfree){7.1054273576010019e-15} exceeds 1.0000000000000001e-15
test_functionallinearfree.cpp(214): error in "test_2": absolute value of math::abs(norm_sum_compositefree - norm_sum_functional){7.1054273576010019e-15} exceeds 1.0000000000000001e-15
up issue #112
continue to up models
fix doftable // with 1d vectorial case
fix when dim!=realdim
clean isIn() conformal case
use LOG_IF
fix warning with clang ( with vf::one() )
fix + brings more logical
by default solutions and errors are no exported