Strip leading and trailing whitespace from params.get, add get_raw.

[wout]

Purpose

Implements #1141.

Description

Basically, params.get and params.get? have been renamed to params.get_raw and params.get_raw? respectively. The original methods are now wrappers for their *_raw variants, but they strip away leading and trailing whitespace.

# with: email= [email protected] &age=41
params.get(:email) # => "[email protected]"
params.get_raw(:email) # => " [email protected] "

Checklist

• - An issue already exists detailing the issue/or feature request that this PR fixes
• - All specs are formatted with crystal tool format spec src
• - Inline documentation has been added and/or updated
• - Lucky builds on docker with ./script/setup
• - All builds and specs pass on docker with ./script/test

[paulcsmith]

Woo hoo! Looks great