Support richtext in inlineStr (#72)
Support richtext in inlineStr (#72)

* rustfmt fixes

* support richtext strings in inlineStr

Extract richtext reading from `read_shared_strings` to `read_string`, and use
for inlineStr instead of `read_inline_str`.

* fix shared string parsing

* tidy up remaining comments

clear buffer while reading shared strings
read to closing tag when reading a non-richtext string

tafia/calamine