Add templates for writing my blog, modify some

1. modify 'htmltemplate' add 'charset="UTF-8"' ;
2. add html  templates: blkqut(blockquote), pre, li, u, ol;
3. add blog templates: blogpage, comtxt, keypoint, em1, em2,
em3, em, hl, keyw, tit, ulist, olist, cppcode, cscode, asmcode