use wp default jquery. See long comment

This solves 2 problems:
1st we was registering
jquery with the already registered by default
"jquery" handle. 2nd hardcoded jQuery version has
maintanability issues, while WP offers updated
and standard jquery itself.
2nd wp's dafault jquery is loaded in no-conflict
mode, so "$" is not a function by default. I've
modified application.js.coffee in order to have
$ setted up out of the box
resized images target path was missing a slash
Merge pull request #173 from pioneerskies/default_jquery

use wp default jquery. See long comment
Following convention

Thanks @Arkham
Merge pull request #174 from davidmh/master

the path for resized images was missing a slash, view description
initial i18n - spanish
Missing string & unnecesary strings removed
mocking __() for tests
fix for "PHP Warning:  date(): It is not safe to rely on the system's timezone settings" for assets compile command.
refactoring fix
Merge pull request #176 from mukkoo/master

fix for PHP Warning:  date():
Update README.mdown

Just to make it super clear which ruby and compass are we talking about :). Some stupidos like me had it messed #177
Merge pull request #178 from onnimonni/patch-1

Good addition. Thanks a lot for your contribution.
Merge pull request #175 from davidmh/i18n

Very good work! Sorry for our delay. With your code we'll implement soon the italian localization.