Add support for languages

Create a /languages folder, update .pot
Create languages folder and .pot file with strings

Other changes, per Codex (
http://codex.wordpress.org/Function_Reference/load_plugin_textdomain ) :
* load_plugin_textdomain should be called as early as 'plugins_loaded'
* path should use a trailing foward slash
* .pot filename should correspond to the domain ('job_manager', in this
case)

Individual language files should be called, for instance for language
pt_PT,  job_manager-pt_PT.po and job_manager-pt_PT.mo
Add missing textdomain
Updated .pot and pt_PT translation
Merge pull request #21 from zedejose/master

Create languages folder and .pot file with strings
Merge pull request #22 from spencerfinnell/feature/arg-filter

Allow query arguments to be filtered when outputting job results.
Link job location to Google Maps, and assume job is for telecommuting if left blank. Closes #11
Made link a template tag arg
Turn off location link in listings wrapped in anchor
If cats enabled, show filters by default Closes #19
maintain aspect ratio Closes #14
Bulk and regular approve. Closes #16, Closes #15
Admin uploaded. Closes #13
Limit the length of taglines