Add types table in WCPS cheatsheet

[Dimitar Misev]

Add a table like ​https://doc.rasdaman.org/04_ql-guide.html#atomic-types
to the end of ​https://doc.rasdaman.org/11_cheatsheets.html#coverage-operations (in a subsection here).

The rasql one doesn't work for wcps as is because char should be unsigned char, and octet should be char I think.

[Bang Pham Huu]

From ​http://portal.opengeospatial.org/files/?artifact_id=32319

Table 2 – Coverage range field data types.
boolean Boolean
char 8-bit signed integer
unsigned char 8-bit unsigned integer
short 16-bit signed integer
unsigned short 16-bit unsigned integer
int 32-bit signed integer
unsigned int 32-bit unsigned integer
long 64-bit signed integer
unsigned long 64-bit unsigned integer
float Single precision floating point number
double Double precision floating point number
complex Single precision complex number
complex2 Double precision complex number 

[Dimitar Misev]

Looks correct, but I think we additionally support cint16 and cint32.