Apostrophes in Scheme Names Cause Problems

[as2388]

At the moment it is possible to put an apostrophe in the name of a code scheme. However, this causes the name to fail to display in the table headers.

We should prevent apostrophes in the code scheme editor, and/or escape them when rendering the headers.

[lukechurch]

@pmishkin

[as2388]

Coda is now giving me errors when I type an apostrophe into the editor.

Not sure how I triggered this error before - perhaps it was by editing the scheme file directly (in which case, FileUtils.loadCodeScheme needs to perform the same validation as the editor save button).