Fixing csproj to v4

Nuget for beta 2

Merge branch 'master' of github.com:mbdavid/LiteDB

Fix decimal index litedb-org#693

Fixing version compiler to version 3.1.3

Add xml documentation on build

Fix nuget to 3.1.1

Add Regex to custom type litedb-org#515

Update nuget to 3.0.1

Merge pull request litedb-org#436 from tetious/dotnet-core-shell

Add dotnet core support for shell