Add CI framework

- travis with valgrind, cppcheck, ubsan, codecov, covscan (future)
  - appveyor with MSVC 2010 through 2017, cygwin 32/64, mingw 32/64
  - README, LICENSE, etc.

test/Jamfile.v2

@@ -6,6 +6,9 @@
 ##
 ##
 ##############################################################################
+
+import testing ;
+
 rule test_all
 {
    local all_rules = ;