Implements a parser that concatenates duplicated keys in a section

[rickyah]

Instead of just ignoring or throwing errors when the parser founds a duplicated
key, this parser merges the key values using an specified string
This is a new implementation requested by user @xtu and references PR #70

e.g. this ini file

[section]
key1 = hello
key1 = world

is equivalent to this one:

[section]
key1 = hello;world

[rickyah]

@xtu could you please check that this implementation works for you. I still need to change the interface so the parser accepts a configuration object, but it is functional

[beatcracker]

Wow, that's great news! For example, Subgit uses duplicate keys to store SVN→Git branch mappings and I recently had to parse its ini file. Example:

#  Wildcard mappings:
#    Use wildcard branches and tags mappings to define correspondence between set of Subversion
#    directories that represent branches or tags and corresponding Git references:
#
#    branches = branches/*:refs/heads/*
#    branches = branches/*/*:refs/heads/*/*
#    branches = branches/*/project:refs/heads/*
#    branches = branches/feature_*_2015:refs/heads/features/*

I look forward for this feature to be finished, so I can update my PowerShell module.

[rickyah]

Just updated the PR, now the new parser accepts a configuration object that allows setting the string used to concatenate the duplicated keys instead of passing that data in the constructor. That's similar as the way the normal parser works. This led to a simplification of the API, the IniParserConfiguration class now has the same functionality as DefaultIniParserDataConfiguration (this last one class is just an "alias") and I got rid of the IIniParserConfiguration interface, as extending a configuration object it just complicated things for no reason: you needed to create both a new interface and a new class.

I've also used the tests provided by @xtu in his original PR, there are implemented in the class ConcatenateDuplicatedKeysIniDataParserTests.

@beatcracker glad this feature is also useful to you! :)

Take a look to the commit message for detailed info: (75a67d9804a7132876d5725433b92be48d11282a]

BTW if anyone has a better and shorter name for the new parser class (ConcatenateDuplicatedKeysIniParser) I'm open to suggestions, looks too long for me

[rickyah]

Tomorrow I'l create a new package for NuGet, it is 1am here and I need to 😴

[rickyah]

@xtu @beatcracker I've merged this PR released version 2.2.0. You can grab the source code or update your packages if you are using NuGet.
Enjoy! ;)

[xtu]

Great job! Thanks @rickyah