document cx_strreplace() family of functions and improve docstrings

document substring family of functions

write section in string docu about comparisons and concatenation

write Section about basic string functions

start documenting the string functions

add missing documentation about creating iterators

add iterator documentation

add convenience type CxIteratorBase

fix build dir not created when invoking docs target directly

intro text for parsers

add w.i.p hint to parsers topic

complete the printf documentation and fix code formatting

complete description for strings and buffers

add link summary text to strings and buffers topic

fixes accidental typos due to auto-resolution of topic titles

add intro text for collections API

(0) -1000 -300 -100 -16 +16 tip

mercurial