build: i18n: first steps towards win build
build: i18n: update vcbuild.bat to add i18n options
build: i18n: windows builds, doesnt work yet
build: i18n: try to revert bad .gitignore changes
build: i18n: try to get the build going
build: i18n: builds again

. Don't mess with the runtime library, and fix the defines.
build: i18n: windows: progress - icudata warning OK

we're getting there..

Errors still:
icuuc.lib(umapfile.obj) : error LNK2001: unresolved external symbol
__imp_InitializeSecurityDescriptor
[e:\node\deps\v8\tools\gyp\mksnapshot.x64.vcxproj]
icuuc.lib(umapfile.obj) : error LNK2001: unresolved external symbol
__imp_SetSecurityDescriptorDacl
[e:\node\deps\v8\tools\gyp\mksnapshot.x64.vcxproj]
icuuc.lib(wintz.obj) : error LNK2001: unresolved external symbol
__imp_RegQueryValueExA
[e:\node\deps\v8\tools\gyp\mksnapshot.x64.vcxproj]
icuuc.lib(wintz.obj) : error LNK2001: unresolved external symbol
__imp_RegOpenKeyExA [e:\node\deps\v8\tools\gyp\mksnapshot.x64.vcxproj]
icuuc.lib(wintz.obj) : error LNK2001: unresolved external symbol
__imp_RegCloseKey [e:\node\deps\v8\tools\gyp\mksnapshot.x64.vcxproj]
build: i18n: windows: IT BUILDS.

.. but crashes, with no data. The "small-icu" option should enable the
command line at least
build: i18n: windows: Allow --icu-data-dir and env var always. Fix docs.

Windows builds with "stub" (null) ICU data. Changed the env vars and
parameter to work always.
Merge pull request #1 from srl295/smaller-icu-win

Merge back in Windows changes- still a work in progress, but they are able to build a 'stub' ICU data.