Optimize ef_write_block function: The function did single byte writing until a start of a page was detected. Only in that case a multi byte write was used. According to the manual page write is not limited to 256 byte. Multiple bytes may be written until the end of the page is reached => Changed implementation to always use multi byte writes which increases the performance of the write block function

1b9be6040d8279117c7fc99d528790611638f10b V1.4.7 release
ba9d99a2e310da601a948ff11ad665260c600e18 v1.4.8 release
143fe85f82a2e2aca50eb0c29bc55066cb4fe497 v1.5.0 release
afa55a50cc724b11b959fa81567d59ede251ef22 v1.5.1 release
54a480c43e977db8fc6969551ad6148f2ad46e15 v1.5.2.beta release