Make translatable

Update small strings with the core functions to make translatable.
Merge pull request #36 from bueltge/master

Add german language files and small fixes for translations, props @bueltge, props @davidbauer
Add german language files.
Update german language files and change the pot core

the pot had the wrong string for load translation fil; now I have create
a new file with all strings.
Also a string there now is translatable; update lang files
Make the plugin comments translatable
Add French translation, change pot name
Merge pull request #40 from boddhi/master

Add french translations, cleanup POT file, props @boddhi
adding dutch l10n, props @BjornW
Update languages/readme.md
Change the textdomain to post-forking
Merge pull request #43 from boddhi/master

Change the text domain to `post-forking` to reflect the plugin slug, props @boddhi
Prevent CSRF attacks on post forking and merging
Merge pull request #44 from joncave/nonces

Prevent CSRF attacks on post forking and merging actions (NONCE ALL THE THINGS!), props @joncave.
properly implement map_meta_cap, fixes #18, fixes #35
implement custom wp_die_handler, fixes #32
properly init caps on first run of test, fixes #32
testing suite refactor
fix for pre-3.5 testing
fix for pre-3.5 testing