changed the description about organization statistics
Changes in the texts of the main page.
Changed from Retos to Centro de Apertura

Signed-off-by: Miguel Angel Gordian <miguel.angel@codeandomexico.org>
Merge pull request #22 from CodeandoMexico/change-index-site-text

Change index site text.
Some text in the landing page is changed due to grammar.
Merge pull request #21 from zoek1/master

Add "Apertura de datos"
The link to the retos platform is changed to Centro de Apertura.
Changed datamx logo to new logo featuring codeando mexico in it.
Merge pull request #23 from CodeandoMexico/change-index-site-text

Changed datamx logo to new logo featuring codeando mexico in it.
Adjusted the size of the logo in the navbar and changed the size of the font in the navbar to make it look lighter.
Merge pull request #24 from CodeandoMexico/change-index-site-text

Adjusted the navbar to comply with apertura.datamx.io
Changed navbar links padding to quit overflow.
Added letter spacing to navbar links to match apertura.datamx.io
Merge pull request #25 from CodeandoMexico/development

Development merge with changes for apertura.datamx.io