Enable visual styles for Windows Vista and up. Word delete hot key

Visual styles:
- Visual style is enabled by including a manifest file via resource in
  the binary, then dynamically linking with comctl32.dll at runtime
- Appropriate error handling for runtime linking (not extensively tested)
- To compile the binary properly, use rc.exe to build a .res file, feed
  said file into windres which outputs to a .o file, then finally feed the
  .o file into gcc for linking

Word delete hot key:
- The algorithm behind word delte operates on a char array inplace
  thus is potentially unsafe
- After using the hot key, the cursor location is set to 0, this will need
  to be fixed