Aligned to guideline and path optimized Android and Bitbucket (#99)

* Visually centered a few icons, some new paths and optimizations.

Apple - Visually centered and change the path to more a accurate one.
Bytes: 1011 —> 580.

Dropbox - Visually centered and change the path to fix point alignment.
Bytes: 338 —> 350.

Twitter - Visually centered.
Bytes: 425 —> 431.

Ubuntu - Visually centered and change the path and color to a more
accurate one.
Bytes: 755 —> 674.

Vimeo - Visually centered.
Bytes: 375 —> 379.

WhatsApp - Visually centered and change the path and color to more a
accurate one.
Bytes: 646 —> 611.

Windows - Visually centered and change the path to fix the lines
between shapes.
Bytes: 274 —> 284.

Hope this helps.

FYI: Wikicommons have good SVG shapes and most companies have brand
guidelines with accurate logo renditions and colors.

* Removed newlines, fixed Ubuntu color and updated ReadMe and Twitter PNG.

* Twitter PNG Artifacts Fix.

* Optimizations and new color palettes.

Apple - New color palette that better represents the brand, and tiny
bit smaller.

Ubuntu - I keep finding ways to make this one smaller.

Wikipedia - New color palette that better represents the brand, and bit
smaller.

* Update

* Update drama

* Solving conflicts

* Solved conflicts.

* Optimizations and new color palettes

Apple - New color palette that better represents the brand, and tiny
bit smaller.

Ubuntu - I keep finding ways to make this one smaller.

Wikipedia - New color palette that better represents the brand, and bit
smaller.

* More Ubuntu optimizations.

Learning SVG as we go.

* Revert "More Ubuntu optimizations."

This reverts commit 74c1a45959.

* More Ubuntu Optimizations.

* Guidelines Folder.

* Guidelines.

Added guidelines with instructions.

* Revert "Guidelines."

This reverts commit eb30dfe163.

* Revert "Revert "Guidelines.""

This reverts commit 76edce25ec.

* Removed guidelines for small squares.

* Aligned to guideline and path optimized Airbnb, Amazon, Authy, Badoo and Bitcoin.

All were aligned accordingly and optimized to the following percentages:

Airbnb - 43%
Amazon - 0%
Authy - 38%
Badoo - 23%
Bitcoin + 1%

I’ll update Readme.

* Fixed Amazon radius. Whops.

* Updated from Master Branch.

* Aligned to guideline and path optimized Android,

All were aligned accordingly and optimized to the following percentages:

Android - 31%
Bitbucket + 3%

Updated README with the new file sizes.

* Correct radius on Android

images/svg/bitbucket.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" fill="#205081" aria-label="Bitbucket" role="img" viewBox="0 0 512 512"><rect width="512" height="512" fill="#fff" rx="15%"/><path d="M256 33C142 33 48 64 48 102c0 10 24 155 35 212 4 27 71 63 173 63s167-37 173-63c11-57 35-202 35-212-2-39-94-69-208-69zm0 298c-37 0-65-29-65-65 0-37 29-65 65-65 37 0 65 29 65 65 0 35-29 65-65 65zm0-208c-73 0-133-12-133-29 0-16 59-29 133-29 73 0 133 12 133 29 0 16-59 29-133 29z"/><path d="M405 369c-4 0-6 2-6 2s-51 41-143 41-143-41-143-40c0 0-4-2-6-2-4 0-8 2-8 8v2c8 43 14 73 14 77 6 31 68 55 141 55s135-24 141-55c0-4 6-35 14-78v-2c2-4 0-8-4-8z"/><circle cx="256" cy="263" r="33"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" fill="#205081" aria-label="Bitbucket" viewBox="0 0 512 512"><rect width="512" height="512" fill="#fff" rx="15%"/><path d="M422 130a10 10 0 0 0-9.9-11.7H100.5a10 10 0 0 0-10 11.7L136 409a10 10 0 0 0 9.9 8.4h221c5 0 9.2-3.5 10-8.4L422 130zM291 316.8h-69.3l-18.7-98h104.8z" fill="#2684ff"/><path d="m59.632 25.2H40.94l-3.1 18.3h-13v18.9H52c1 0 1.7-.7 1.8-1.6l5.8-35.6z" fill="url(#a)" transform="translate(89.8 85) scale(5.3285)"/><linearGradient id="a" gradientTransform="scale(-31.4) rotate(-39 -2 2)" gradientUnits="userSpaceOnUse" x2="1"><stop offset="0" stop-color="#0052cc"/><stop offset="1" stop-color="#2684ff"/></linearGradient></svg>