HttpRequest: value encode for form body type

Merge pull request #5 from revosystems/bugfix/rev-22585

Value encode for form body type

HttpRequest general improvement and new call methods added

HttpRequest general improvement and new call methods added #3
HttpRequest inits fix #4

HttpError struct set public

Merge pull request #2 from revosystems/feature/rev-21952

HttpError struct set public

Changes to Package.swift

0.3.9

minor change

0.3.8

Package for revofoundation working

0.3.7

Updated package

0.3.6

Trying to improve package

0.3.5

Added package.swift