SPARTANS!What is your profession?
Bin and obj folders added to ignore list.
Some files added to git ignore list.
GuardAgainstEmptyEnumerable fixed.
GuardAgainstStringIsNullOrWhiteSpace added.
Binaries rebuild.
GuardAgainstStringIsNullOrWhiteSpace added.
Pielikts DataToCSV.
If items count is 0, return empty MemoryStream, instead of null.
Uploaded file validator and byte array extensions added.
Merge branch 'master' of gitlab.ebit.lv:net/spartanextensions

Conflicts:
	Binaries/SpartanExtensions/SpartanExtensions.dll
	Binaries/SpartanExtensions/SpartanExtensions.pdb

UploadedFileValidator modified.
Mime type validation added.
Stream extensions added.
Fixed problem with open xml format validation.
Preparation for creating a nuget package done:
- nuspec file added.
- Assembly info modified.
Added ToNullSafeString method for object extensions. Version automatic increment added.
Added summaries for every public method.
Added missing summaries for public stuff.
Description changed.