Nimview Versions Save

• fixed crashes in http mode
• fixed crashes during shutdown
• added warning in case that threads are used without orc/arc

• fixed issue with compile option core_only
• refactored some code to store most/all global variables in global.nim
• fixed version in nimble file

Refactoring and adding compile parameters Renamed functions: "addRequest" to "add" and "callFrontedJs" to "callJs

• Compatible to Nim 1.6
• Doesn't require threads:on anymore
• Automatically use threads for webview if threads:on
• Additional compile option to still run as single threaded -d:useWebviewSingleThreaded
• Refactored large nimview.nim file to smaller files

Fixed "callFrontendJs" function to back-end to easilly call a javascript function Necessary but potentially breaking change: it is now required to compile with threads:on

• Fixed Android Sample

• Added "callFrontendJs" function to back-end to easilly call a javascript function (using Websockets in debug mode)
• Changed svelte examples to speed-up build

• applied fixes so that the demo can run on Ubuntu 21.04:
• fixed webview.nim to define window.external.invoke on gtk
• added webview locally as subtree, so I the PR doesn't need to be merged to the original webview library
• updated webview to the latest C99 webview of go wails
• changed the way data urls are generated, in case that "inlined.html" is used as url, so that gtk can handle it
• updated js so that data urls can be detected on gtk (you need to update nimview when used in npm packages.json)
• added some additional experimental compile time flag "-d:webview" so that webview2 can be used (can compile, has probably a lot of issues)

Added:

• tests,
• bugfixes,
• delayed start of webview / server as additional parameter

• Fixed nimble file
• Fixed android example
• Misc fixes