-add max_field_length to parse_conversion_spec (initial)
-add  a end_on_nomatch field to struct expr

Signed-off-by: etienne <etienne.basset@ensta.org>
remove find_char & find_string
replaced by the usage of 'end_on_nomatch'

Signed-off-by: etienne <etienne.basset@ensta.org>
limit max_field_length to 'sizeof buffer - 2'

Signed-off-by: etienne <etienne.basset@ensta.org>
fully support field length

Signed-off-by: etienne <etienne.basset@ensta.org>
update README (TODO)

Signed-off-by: etienne <etienne.basset@ensta.org>
max_field_length takes now the null ending char

Signed-off-by: etienne <etienne.basset@ensta.org>