Fix of issue #720
Issue #717
Issue #651

Made My documents default directory
Date of pipe creation by default (from previous pipe)
Revert "Issue #717"

This reverts commit 285183a70a2c54c32b3247f1983b0b8b676cf578.
new Joint - list of available element doesn't display correct spool length
show only active component type
New joint causes crash
Merge remote-tracking branch 'origin/master' into O_Morozova
update IsModified for pipe
Merge pull request #734 from olga-jane/Protsenko_files2

Implement attaching files functionality
Merge pull request #731 from olga-jane/Morozova_BugFix

make new Spool active
Merge pull request #737 from olga-jane/Protsenko_v1

Exception on closing pipe form
Merge pull request #739 from olga-jane/Protsenko_UI_fix

new Joint - list of available element doesn't display correct spool leng...
Merge pull request #741 from olga-jane/O_Morozova

Show only active component type
Merge pull request #742 from olga-jane/Crash

New joint causes crash
Merge branch 'master' of https://github.com/olga-jane/prizm into Protsenko_fixes

Conflicts:
	src/PrizmMainProject/Forms/PipeMill/NewEdit/NewSavePipeCommand.cs
Merge pull request #736 from olga-jane/Protsenko_fixes

Date of pipe creation by default (from previous pipe)
Merge pull request #747 from olga-jane/Morozova_UI

update IsModified for pipe