Removing IDE specific ignores

Reasons
- .gitignore contains IDE specific ignores
- IDE specific ignores should be setup using
  global gitignore on local box.
  for eg. create a .gitignore locally and use ...
  git config --global core.excludesfile .gitignore

Changes
- Removed .idea generated by IntelliJ.
- Removed .DS_Store generated by Mac OS.
- Removed .project generated by Eclipse.
- Removed .pydevproject generated by PyDev.
- Removed atlassian-ide-plugin.xml
  generated by Atlassian IDE.

Change-Id: I902e980834716edb8a30ca58df520fd3fc0f73aa
Closes-Bug: #1257279

.gitignore

@@ -1,6 +1,5 @@
 vagrant/
 *.pyc
-.idea
 trove_test.sqlite
 .venv
 run_tests.log
@@ -10,7 +9,6 @@ trove/vcsversion.py
 *py*.egg
 .coverage
 cover/
-.DS_Store
 dist/
 host-syslog.log
 tags
@@ -20,11 +18,8 @@ trove/versioninfo
 AUTHORS
 ChangeLog
 trove.iml
-atlassian-ide-plugin.xml
 .testrepository
 .pid
-.project
-.pydevproject
 
 # Sphinx
 doc/build/*