Raise a better error when a file upload fails in Differential

Summary:
Ref T2296. If a file upload fails (e.g., too large), we read the textarea from the "Create New Diff" interface. This means we show the user an error like "empty diff" when we should show them an error like "file upload failed, patch is too large". This is part of the issue in T2296, which features a 2.5MB diff.

Instead, check if a file was specified, so we'll raise a better error.

Test Plan: Tried to upload a large patch, got a "file is too large" error instead of an empty-diff-related error.

Reviewers: btrahan, vrana, codeblock

Reviewed By: codeblock

CC: aran

Maniphest Tasks: T2296

Differential Revision: https://secure.phabricator.com/D4369
Default to "True" and "False" for bool options.

Summary:
Rather than throwing if we don't `setOptions()`, let's just default to `true`
and `false`.

Test Plan:
Removed a `setOptions()` call temporarily and saw options default to
`true` / `false`.

Reviewers: epriestley, btrahan, chad

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2255

Differential Revision: https://secure.phabricator.com/D4368
Minor, fix old call to setOptions() introduced out of order.

Auditors: codeblock
Fix more boolean reversals.

Summary: Missed these in D4357.

Test Plan: Meh.

Reviewers: epriestley, chad

Reviewed By: chad

CC: aran, Korvin

Maniphest Tasks: T2255

Differential Revision: https://secure.phabricator.com/D4371
Remove all older-style navs

Summary: Move all navs to use the newer-style, darker, textured look. I'm //pretty// sure this doesn't break anything.

Test Plan: Looked at a bunch of apps.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D4376
Add Atom export to Phame

Summary:
There's no link to this yet, I'll add it to some skin.

Fixes T2272.

Test Plan: http://validator.w3.org/appc/

Reviewers: btrahan, epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2272

Differential Revision: https://secure.phabricator.com/D4366
Have form elements default to the standard font size.

Summary: Font size globally is 13px, but form elements were 12px and harder to read. This helps readability and consistency with form elements.

Test Plan: Checked various forms, left comments.

Reviewers: epriestley, btrahan

Reviewed By: btrahan

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4377
re-factor DifferentialChangesetParser pass 3 / N

Summary: introducing a new friend called DifferentialHunkParser. Sort of like the DifferentialChangesetParser but works with hunks only. tried to grab hunk parsing type things from across the code base and move them into this new class.

Test Plan: unit tests and played around in Differential a bit.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2009

Differential Revision: https://secure.phabricator.com/D4351
fix whitespace mode for differentialHunkParser

Summary: I forgot to "set it" from the changeset parser.

Test Plan: made a diff with silly whitespace changes. toggled the various whitespace modes and got appropriate results

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2009

Differential Revision: https://secure.phabricator.com/D4378
Break profiles less after D4376

Summary: This won't win any awards, but makes User and Project profile pages significantly less broken in the wake of D4376.

Test Plan:
{F28858}
{F28859}

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D4382
Update form input styles.

Summary: Adds a slight blue border, radius, and shadow to inputs and textareas (small). Better padding for legibility as well.

Test Plan: Review a number of forms

Reviewers: epriestley, vrana, btrahan

Reviewed By: btrahan

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4383
Merge remote-tracking branch 'origin/master' into r4nt-master