[READY] Use = and & in compare URLs ( #131)

[RomainDazy]

As stated in issue #131, the release comparison URLs for corporate Bitbucket servers include special characters = and &.

This commit currently replaces respective HTML entity names for = and & in the whole generated output.
I could not think of a situation where it could break existing features, but let me know if this is the case.

This is my first contribution to this repository, so any feedback is welcome (even outside of the diff, e.g. on a commit message policy I should follow, if any)

Thanks!

[RomainDazy]

I faced an issue similar to #131, but in commit subjects, where backticks were printed as "`".
This occurred only when using a custom template, not with compact or keepachangelog.
I then realized that the difference between my custom template and the default ones is that they use "{{{subject}}}" rather than "{{subject}}".

I then updated the href section of the default templates to use triple curly brackets, which:

• allows removing the ugly ".replace" added in the initial commit
• still complies with the tests created in the initial commit to solve compareUrl: url parameters broken #131

[RomainDazy]

Cleanup done in tests

[cookpete]

Sorry for the delay on this. I really appreciate the effort, but ended up just using noEscape: true to prevent handlebars from escaping anything, which hopefully will solve all issues around this.

@RomainDazy Please don't be put off contributing! This was an awesome PR.

[RomainDazy]

No problem ! :)