update readme

README.md

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-# spacing
+# Spass library
+automated paddings and margins via Scss/Sass
+
+Advantages:
+- Choose your base spacing that matches your design.
+- Build your own list of paddings and margins.
+- Extend the classes in your other Sass/Scss modules
+
+
+Follow [@zerox_me](https://twitter.com/zerox_me) for updates.
+
+
+
+## Installation:
+
+- Bower
+
+```bash
+   bower install spass
+```
+
+
+### Usage:
+
+- Define your base spacing by overriding `$spass-base`.
+- Define your spacing sequence by overriding `$spass-array`.
+- include the mixin `spass-creator()`
+
+
+## Spass array structure:
+#### Property:
+- margin
+- padding
+
+#### Class name
+- Naming convention is up to you. The used one is `mt-sm` means margin top is small. `p-none` padding is 0
+
+#### Spacing variable
+- The value of the margin/padding assigned to the class
+
+
+
+## Contribute
+if you think that I missed something let me know so we can make it better together :)
+
+reach me on twitter [@zerox_me](https://twitter.com/zerox_me) if you needed any help
+
+## License
+Copyright (c) 2015 zero, released under the MIT license