update boost download address

gcontini

2020-10-10 fc059acc0101b45b91be98256289c4060df8e30e

 .gitignore

@@ -9,6 +9,7 @@

#Visual studio files
.vs
/out

# Compiled Static libraries
*.lai
@@ -20,6 +21,7 @@
# Cmake generated files
build/*
!build/.gitkeep 
install/*

#eclipse files
.cproject
@@ -33,3 +35,4 @@

**/CMakeCache.txt
**/CMakeFiles
/CMakeSettings.json