The aggregate methods include `count`, `min`, `max`, `sum`, `avg`,
`countDistinct`, `sumDistinct`, and `avgDistinct`, all of which
can now receive raw expressions, e.g.
```js
knex('users').count(knex.raw("data->'active'"));
```
There seems to be some demand for this, and I think it's cleaner than the alternative of
```js
knex('users').select(knex.raw("count(data->'active')"));
```
* Fixed knex #1577
Aslo corrected tests for primarykey
* Fix for installing from github
* Fix for installing from github
* Fix for installing from github
* Move LOCK hint for MSSQL after join component of select
* Add missing import statement
* Added "WITH" clause to select, update, insert and delete queries.
Fixed forUpdate lock query building
Add detection of decimal value of Numeric parameter and set proper sql.Type for it. (Fix for #1604)
* Change let to const for variable declaration
* Fix MSSQL non-numeric parameters binding
Only left alone ones in `test/tape/transactions.js` which would just
cause unnecessary conflicts and get cleaned up by separate pull
request #1257 anyway.
