Fixing parameter bug

If no parameters were specified, an extra equals sign was added. This bug is now fixed.

URL parameters properly parsed

URL parameters and URI path are properly URL-encoded

AWSSigner

• Sort URL Queries
• Add Error handling for reading credentials file
• Add single URL encoding to URL segments in canonical request as expected by AWS.

AWSSigner

• Add session token textbox to be used with session/security token
  received from assume-role calls
• Add checkbox for whether to use the session token
• Add checkbox to dynamically assign the region and service to be
  signed
  • If checkbox is unchecked, AWSSigner will not sign requests that do not
    match the region and service specified in the profile
  • If it is checked, AWSSigner will load the service and region from the
    request it receives, meaning it will sign every request
• Add checkbox to grab access key and secret key from the default
  profile in the ~/.aws/credentials file
• Fix bug where signer would add extra session tokens
• Compiled with JDK 11.0.2

AWSSigner

• Fix compatibility with Java >= 9
• Update gradle build configuration
• Fix extension sending request twice

AWSSigner

• Merge profile functionality from @wstrei

AWSSigner

• Fix date issue
• Add context menu item to enable/disable the signer
• Update tab to be more visibly appealing

AWSSigner

Initial release.