Improving login flow and default authentication headers

See merge request !3

Adding X-Requested-With header to all API requests, to avoid a basic auth prompt for unauthenticated requests. Adding demo credentials to login page. Updating a few npm audit flagged packages in npm.

Updating formatting and text of About page to be more clear

See merge request !2

Add MIT license and update About page

See merge request !1

Updating About page with better marketing info, adding MIT license to source code to allow this work to appear in both open-source and commercial applications.

Removing 'Editor' router-link. Updating scrolling-container div, to correctly size to vertical height of screen. Switching from overflow scroll to auto. Replacing favicon with OpenShot branding.

Updating gitlab CI script to no longer *.gz zip the files, and updating README with deployment instructions

Fixing .env files to work for each mode (development, production), and updating README with deployment instructions.

Edit project & Launch Editor menus added, updateProject action added, fixed some bugs on Project Create vs Edit. Moved project loading spinner below project list (to keep the screen from jumping)

Update project thumbnail when returning to the projects view. Adding ability to clobber a thumbnail.

Refactored context menu and text menu icon into same DIV, icons work on all sizes now. Better disabling of export buttons when button is clicked.

Moved text from menu to icon/button (for more visibility). Re-styled text-editor. Added menu icon hover styles. Updated Caption font/font-size/margins.

Fixed thumbnail widths on all card views. Added col-md sizes on thumbnails. Refactored AddProject, LoadProjects, and RemoveProject (faster async calls). Added Project thumbnails. Changed Projects screen to use thumbnails, context menus. Added profile/presets option to new project modal.

Integrated Export API, with video playback, download, export again buttons. Load the most recent export, and poll any active export records for progress.

Refactored clip length (for small labels). Added image and video error message (for unsupported formats). Fixed bug switching between clip and file of the same original file object.

Refactored moveClip into Vuex action, and invoke this action on both 'Move Clip' and 'Update Clip'... to fix all clip 'positions'

Added sessionStorage to blob image thumbnails (caching them for a session). Reloading the browser tab seems to clear the blob URLs, causing 404s, and then the thumbnails are regenerated. Also made image thumbnail 100% width by default.

Improved editClip to scroll to edited clip (up or down). Refactored how scrolling to clips work. Wait for thumbnail to load first. Reset position when selecting new files. Don't regenerate thumbnail when editing clip. Loop playback. Pause video when trimming clip. Clear errors when editing project.

Refactored default image length to a single function. Only show Export button when clips are added. Integrated 'move up/down' actions. Fixed clip selection to only include the 1 clip. Refactored clip length (seconds) to Vuex. Set correct position and duration of Clip API objects. Preview now supports clip start/end and jumps position to the correct playback spot.

Refactored preview data to live in Vuex. Made clip seconds label react different when it's too small. Added drop-shadow style to context menu buttons. Added editClip action, but not connected yet.