update NuGet packages including assembly references
Removed obsolete AddBaseDir as code relying on it would behave wrong. Solves #249

Solves #249
Merge pull request #253 from johnnyelwailer/remove-AddBaseDir

Removed obsolete AddBaseDir as code relying on it would behave wrong.
refactor namespace
Merge pull request #251 from shishkin/nuget-update

update NuGet packages including assembly references
Try not to kill already killed processes - closes #254
Merge branch 'master' into develop

Conflicts:
	src/app/FakeLib/ProcessHelper.fs
Removed obsolete AddBaseDir as code relying on it would behave wrong. Solves #249

Solves #249
Try not to kill already killed processes - closes #254
Try not to kill already killed processes - closes #254
Merge branch 'master' into develop

Conflicts:
	src/app/FakeLib/ProcessHelper.fs
The stacktrace should only be printed if PrintStackTraceOnError is set.
Merge branch 'master' into develop
Cleanup in targetError
Improving error message in  nuget package creation
Merge branch 'master' into develop
Reference API docs in the readme
Do not require to set the htmlText - and big thanks .to NET for allowing null as strings ;-(
Merge branch 'master' into develop
Removing nulls in NUnit helper - references #256