Module utf8

Unicode Collation Algorithm (UCA) (http://www.unicode.org/reports/tr10/)
is used for utf-8 and unicode strings sorting and for utf-8 strings
comparison

NOTE: pyuca is a very memory cost module! It loads the whole
      "allkey.txt" file (~2mb!) into the memory. But this
      functionality is needed only when sort_key() is called as a
      part of sort() function or when Utf8 strings are compared.

So, it is a lazy "sort_key" function which (ONLY ONCE, ON ITS
FIRST CALL) imports pyuca and replaces itself with a real
sort_key() function

returns unicode id for utf8 or unicode *char* character

SUPPOSE that *char* is an utf-8 or unicode character only

return length of utf-8 string in bytes
NOTE! The length of correspondent utf-8
      string is returned for unicode string

returns string of length < *length* or truncate
    string with adding *dots* suffix to the string's end

args:
     length (int): max length of string
     dots (str or unicode): string suffix, when string is cutted

 returns:
     (utf8-str): original or cutted string

repr_escape_tab

Value:

{1: u'\x01', 2: u'\x02', 3: u'\x03', 4: u'\x04', 5: u'\x05', 6: u'\x06', 7: u'\a', 8: u'\b', ...

repr_escape_tab2

Value:

{1: u'\x01', 2: u'\x02', 3: u'\x03', 4: u'\x04', 5: u'\x05', 6: u'\x06', 7: u'\a', 8: u'\b', ...