Docpie

* [fix] When "Usage" section contains "Options:"
(e.g. "`prog <options:>`"), it won't be parsed as "Option" section

* [fix] Support windows style line separator `/r/n`

* [fix] when "Usage" stack as `-a<val>` and "Options"
annouced as `-a <val> an option` it will raise an error

* [fix] a bug in test that some tests will not report when they
fail
* [fix] `help` & `version` won't work because of the previous refactor

* [fix] stdopt/attachopt/attachvalue in `set_config`
will re-init the `Docpie` instance
* [fix] ``<a|b>`` will not be parsed as ``<a | b>`` now.

* [new] `appearedonly` argument to allow only show use inputted options
(only options, won't affect commands/arguments)
* [new] multi options section support. Now you can write several options like:


Usage: git <cmd> [options] [<args>...]

Global Options:
-h, --help print this message
rm Options: seperate with options by breaking the line
-f, --force force remove a file

add Options: seperate with at least one visable line
-n, --dry-run Don't actually add the file(s)