Allows field labels to be set in config

[maebert]

This makes it relatively easy to e.g. localise them, by simply in your app config saying

from flask.ext.babel import lazy_gettext as _

SECURITY_LABEL_EMAIL = _("Email Address")
SECURITY_LABEL_PASSWORD = _("Password")

I guess the problem with #155 was that the forms classes were constructed outside an application context. I solved that by creating a proxy object that holds back the actual string realisation until it's needed.

This makes #18 also relatively trivial now.

[mattupstate]

@maebert This looks great. I've always been a little ignorant when it comes to babel. Please allow me to review this and experiment some with babel now before merging this in.

[maebert]

Sure, let me know if I can help in any way.

[mattupstate]

Perhaps we just need some tests that verify this works, and that translations work properly.

[mvdwaeter]

Can be merged in right? Works just like SECURITY_MSG_

[hailcaeser]

Hi, would be keen to use these new features. Am I correct that the build for Python v3.3 but worked fine with others?

[mattupstate]

@maebert Not sure if you're still interested in this PR but I'll be happy to accept if you can merge the upstream updates.

[felix1m]

i manually applied this patch to the current develop branch since i needed it myself. Can confirm it is working properly. Note: When using non-asci characters no not forget to use u'öäü' in python 2.x. Babel of course already provides unicode strings.

felix1m@da8c391

Should i create a seperate PR for this (since it is not really my work :) )?

[maebert]

@felix1m Feel free to post a PR, it's probably less work than rebasing it!

[felix1m]

see pr #390