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.