Fix a bug and two todo's about list

A bug: <li><p> added a newline after bullet.
Todo's: <ol> and indent (copied from HTMLBookReader)
Fix header

I forgot to commit the header changes
case-insensitive for 'rel="StyleSheet"'
code simplification
do not start SyncService if synchronisation is disabled
Merge branch 'patch-4' of github.com:tamo/FBReaderJ into tamo-fix
cosmetic changes
search for texts with zero-width spaces
updated ChangeLog
djvu plugin entry
updated ChangeLog
link behaviour
cosmetic fixes
option name
2.1.1