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/android.svg

@@ -1 +1 @@
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+<svg fill="#a4c639" stroke-linecap="round" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg" aria-label="Android" role="img"><rect fill="#fff" height="512" rx="15%" width="512"/><g stroke="#a4c639"><path d="m107 212v106m299-106v106m-107 66v56m-85-56v56" stroke-width="58"/><path d="m203 88-17-32m123 32 18-32" stroke-width="8"/></g><path d="m257 76c-76 0-115 60-115 105h229c0-47-42-104-114-105zm-115 115v164c0 16 13 29 28 29h172c16 0 29-13 29-29v-164z"/><circle cx="204" cy="130" fill="#fff" r="9"/><circle cx="309" cy="130" fill="#fff" r="9"/></svg>