translate 5.1 introduction.xml
translate half of 5.2 toolchaintechnotes.xml
连接器 -> 链接器 in introduction.xml
translate some of toolchaintechnotes.xml, remove unnacessary enter.
translate chapter05.xml
complete translation of 5.2 toolchaintechnotes.xml
add spaces between Chinese and English
Merge branch 'working' of https://github.com/zsrkmyn/lfs-to-cn into zsrkmyn-working
Merge branch 'zsrkmyn-working' into working