Fix indentation in some files and remove extra body tags in some views
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I've indented some files according to ruby's community convention (2 spaces per indent).
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I've also changed "sign up" text on login page to "sign in".
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Finally, as I checked that the body tag was being "overridden" in some views (http://stackoverflow.com/questions/2603133/is-it-ok-to-have-multiple-html-head-and-body-elements-in-single-page) to set css classes for body according to the current page , I've written the same idea in a "rails-more way": dynamically setting a variable in the pages that demands new classes for body instead of adding a new body tag.
Signed-off-by: Pedro de Lyra pedrodelyra@gmail.com