Ignoring "bld" directory

Store apps (or at least the Javascript ones) build to a "bld" directory.

Although "debug" and "release" are ignored, any custom build Configuration (created through configuration manager) will be added, unless we ignore the whole bld dir.

VisualStudio.gitignore

@@ -12,6 +12,7 @@
 [Rr]elease/
 x64/
 build/
+bld/
 [Bb]in/
 [Oo]bj/