Refactor mysql query creations

[jbyte]

All the functions creating new queries are moved to their own file for easier maintenance. The 'reload' functionality was reworked so it uses the same buffer.

Added new file: autoload/mysqlQuery.vim. The file of all the functions that return a mysql query. Current functions:

• mysqlQuery#GetDescribeTableQuery
• mysqlQuery#GetSelectQuery
• mysqlQuery#GetShowDatabasesQuery
• mysqlQuery#GetShowTablesQuery
• mysqlQuery#GetDropDatabaseQuery
• mysqlQuery#GetDropTableQuery
• mysqlQuery#GetDeleteQuery
• mysqlQuery#CreateUpdateFromCSV (moved from autoload/mysql.vim)

Checklist

• [x] I have written my code in a way that it can be easily tested
• [x] I have written tests for my code
• [ ] I have documented new features in doc/sqhell.txt
• [ ] I have added information to the README (where relevant)
• [x] I have ran the automated tests and performed manual tests.

There was no reason to edit the documentation or readme file.

Edit: Forgot to pull the last upstream changes. Will resolve conflicts tomorrow.

[joereynolds]

I'll try this out today or tomorrow, thanks!