Improved documentation for Loklak repos

Its the final week of GSoC 2016. All the projects are nearing their completion stage. Since one of the plugins from FOSSASIA (https://wordpress.org/plugins/tweets-widget/) is already in WordPress directory, I took this opportunity to write some documentation for other plugins and the plugin maintenance repo.

The documentation now verbosely describes the complete Heroku deployment procedure directly from Github as well as using the Git-Heroku toolbelt (see this).

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Docs for updating to a newer version of WordPress have also been added.

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Screenshots and relevant documentation regarding Loklak API was added to several plugins.

 

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readme.txt of https://github.com/fossasia/wp-recent-tweet

Some screenshots of the plugin (wp-recent-tweet) added in the readme

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Improved documentation for Loklak repos