csvpp 0.7.0

Compile csv++ source code to a target spreadsheet format
Documentation
## v0.7.0

### Features

* Build a statically-linked `x86_64-unknown-linux-musl` and `aarch64-unknown-linux-musl` for people
  who are on a system with an outdated glibc
* Quoting rules for single and double quoted strings have changed to align with OpenFormula and how
  popular spreadsheet programs do it.  Rather than using a backslash like `"a \"quote\""` or 
  `'a \'quote\''` you just double the character.  So `"a ""quote"""` and `'a ''quote'''`.
* Builds for more platforms:
  - aarch64-unknown-linux-musl
  - i686-unknown-linux-gnu
  - i686-unknown-linux-musl
  - i686-pc-windows-gnu
  - x86\_64-unknown-linux-musl
* Switch from `a1_notation` crate to `a1`

### Bugfixes

* Fix a bug causing double-quoted strings (i.e, `""foo""`)

### **Breaking Changes**

* Double-quoted strings now use double-quote (`""`) to escape a single-quote.  Previously it used 
  `\"` to escape.