EHN: update Build.md

BUILD.md

@@ -56,9 +56,11 @@ In the case of H264 build, NASM is needed for assembly code: workable version 2.
 For Mac OSX 64-bit NASM needed to be below version 2.11.08 as nasm 2.11.08 
 will introduce error when using RIP-relative addresses in Mac OSX 64-bit. If you have another NASM version installed, try to unlink the wrong version of NASM, 
 and link to the version to below 2.11.08. Afterwards, check the nasm version with comman "which nasm" and "nasm -v".
+
 In the case of VP9 build, The Yasm assembler is required to build optimized libraries for x86 platforms. 
 Version 0.8.0 or newer is required, except Version 1.0.0.
-In the case of H265 build, H265 have many implementations, the encoder used in library is x265[ref] and the decoder is OpenHEVC.
+
+In the case of H265 build, H265 have many implementations, the encoder used in library is x265 and the decoder is OpenHEVC.
 OpenIGTLink library doesn't build H265 libraries, so the users need to download and compile the libraries by themselves. 
 Afterwards, set the variables-"X265_SOURCE_DIR, X265_LIBRARY_DIR, OPENHEVC_SOURCE_DIR, OPENHEVC_LIBRARY_DIR"-correctly in cmake configuration.