Squashed 'Sources/ASIO/' content from commit 8d4c8c3ce4

git-subtree-dir: Sources/ASIO
git-subtree-split: 8d4c8c3ce43c866f609d2eda9a43fe5b334620be

asio/.gitignore

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+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+compile
+config.guess
+config.log
+config.status
+config.sub
+configure
+depcomp
+install-sh
+missing
+test-driver
+/doc
+/lib
+/boostified
+/tsified
+*.gz
+*.bz2
+*.zip
+/*.cpp
+/*.hpp