Correct bug with wfx_custom_field() function

Have included an admin area check so function doesn't fire when in admin area and cause issues (no post ID available)

Signed-off-by: Jonny Allbut <jonny@wonderflux.com>
Doc change for wfx_custom_field()

Version up and description change to make clearer.
Update wfx_css() $last parameter behaviour

Just a-little tidying in wfx_css() parameter parsing - $last should be checked against 'Y' value, not 'N'
Version up $wfx_css() function

Just adding correct updated version number.
New parameter for wfx_custom_field() function - $trim

New $trim parameter, optionally strips whitespace from custom field value returned.

Default value: 'N'
Accepted values: 'Y', 'N'
Correct file permissions
Update README.txt

Updated 'Get Involved' URL to GitHub.
Merge pull request #8 from louisnorthmore/patch-1

Update README.txt
Remove all references to Google Code SVN

All references updated to relevant GitHub links.
Update 1.1 version numbering

Mark all v1.0RC4 updates as v1.1
Remove wfx_twitter_feed() function

Due to the crazy strict display guidelines the Twitter introduced with v1.1 of their API (and uncertainties about how they will change over time), it's no longer viable to have a custom Twitter feed function. This is plugin territory anyway.

Refers to issue - #1
Update readme

A little tidying of text.
Merge pull request #12 from Jonnyauk/master

Update Wondergrid branch to latest revision.