Added page for forex labs resources

This is not complete and there are sections that need to be filled in or modified.
A modification needs to be made to the docs repo under layouts/default.html for the sidebar update
updated descriptions, added links
updated input query parameter description, updated curl examples
small updates to input parameters, added example response
updated response fields descriptions
updates to calendar endpoint
fixed typos, slightly modified content
added release notes
fixed fxLabs typo
changed error messages
final troubleshooting section edits
changed tradeable to tradable
fixed links in troubleshooting section
fixed typo in troubleshooting section
Added note to users to explain that data from sandbox is not real data
added warning to rates streaming documentation to indicate that data returned is simulated data
Add new error codes related to HTTP method override
alignmentTimezone changes for candles requests
timezone/dailyAlignment no longer mandatory together
added release notes