* Unzip icu4c-55_1-src.zip
* Unzip icu-modified.zip over the just unpacked files, overwriting any duplicates (icu.diff contains a diff of the changes)

Building:
* Open icu\source\allinone\allinone.sln
* Set configuration to Release (needed for the various build tools)
* Select appropriate platform
  * NOTE: Creating the data library for x64 requires compiling on x64!
* Build solution
* Set configuration to Static Release
* Build projects common, i18n, io, layout, layoutex, makedata (in this order)
* Resulting static libraries will be in icu\stlib[64]
