Add Support TOML Project to projects list

This adds new projectproposal to current projects list

Closes coala#705

_projects/standardised-file-format.md

@@ -0,0 +1,70 @@
+collaborating_projects:
+  - coala
+desc: "Provide support to a standardised file format(TOML) for writing configurations"
+difficulty: hard
+initiatives:
+  - GSoC
+markdown: standardised-file-format.md
+mentors:
+  - 
+name: "Support TOML for writing configurations"
+requirements:
+  - "The applicant should have at least one non-trivial patch merged to
+    coala"
+  - "The applicant should be familiar with Python."
+  - "The applicant should be familiar with coala configuration system"
+tags:
+  - Core
+  - Configuration
+  - TOML
+---
+
+This project aims to support a standardised file format like TOML for writing settings.
+Currently coala has a INI style config. It has `LineParser` and `ConfParser` classes to
+parse the settings into sections. These sections are later executed by running the
+appropriate bear. coala also a `ConfWriter` class to write sections back into settings
+file like `.coafile`
+
+This approach has certain limitations. Custom sub-level parsing in INI style config
+is tough and error prone. It makes `LineParser` and `ConfParser` more complex and 
+bug prone and also would slow down the speed of development. A solution would be to 
+use standardised file format like TOML. Using `toml.load` on the config file will 
+return a dictionary. This makes custom sub-level parsing not only easy and accurate
+but also less error prone. Also more importantly completely removes the need 
+for `LineParser`.
+
+TOML provides flexibility, consistency, backwards compatibility and standard. It has
+widespread acceptance, documentation and robust parsers. TOML has been recommended as
+the configuration file for software packages to specify their build dependencies. Due 
+to its popularity it offers a reduced learning curve compared to INI style config.
+
+#### Milestones
+
+##### PREPARATION/BONDING
+
+- The applicant has created and merged a cEP for this project.
+- The applicant should be familiar with the codebase.
+- The applicant should know how to work with the community.
+
+##### CODING PHASE 1
+
+- Create a class named `TomlConfParser` to load settings from TOML
+  file into sections.
+- The corresponding code is properly tested, documented, reviewed,
+  and merged.
+- Write and test all possible settings in the new parser. 
+
+##### CODING PHASE 2
+
+- Create a class named `TomlConfWriter` to write sections into  
+  TOML file.
+- The corresponding code is properly tested, documented, reviewed,
+  and merged.
+- Test all possible settings in the new writer.
+
+##### CODING PHASE 3
+
+- Support required and missing features in the parser by making PR's to
+  [toml](https://github.com/uiri/toml)
+- New coala tutorials and user guides have been created to show how to
+  write settings in TOML.