Possibility to now show README.md on GET /

Possibility to now show README.md on GET /

Bugfix + Travis-CI

@Thithi32 fixed a bug on request parameter's validation and I implemented a simple test on Travis-CI.

v0.0.26

v0.0.25 -- 2016-12-05

• Language settings;
• New mail function template;
• Nodemailer update;

v0.0.26 -- 2017-01-29

• New options on response (define status code, headers and return a file);
• Update on tests;
• Better algorithm on function registering;