ant icons update
there's no need to load dom stubs for already parsed XML file (IDEA-102582)
don't clear dom/sem on low-memory events when it's needed for another dom/sem. Otherwise all the needed elements will be calculated and immediately cleared forever. OOM might be a friendlier alternative in this case (IDEA-102582, IDEA-97337)
[git] Fix javadocs

* Remove obvious javadocs.
* Move lockingCommand javadoc to the public method.
[git] Change GitHandler#setNoSSH() to setRemoteProtocol()

* Set remote protocol to null by default => safely remove all 82 calls
  to setNoSSH.
* For remote operations (pull, push, fetch and clone) set the protocol
  to SSH (HTTP is handled separately for now).

This is a preparation for working with HTTP via native Git.
[git] Detect remote protocol from the url

* Clone, fetch and ls-remote are trivial: just pass the url parameter.
* Pull: modify the method signature, since it can return pull or merge
  handler depending on the situation. For merge url is not needed.
* Standard Push (GitPusher):
  - simplify the logic by taking the first url
    instead of iterating over all of them,
    because we don't support pushing to several urls very well anyway.
  - report error if there are no push urls: GitPusher shouldn't be
    called in this case at all.
* Push when remote branch is deleted (GitDeleteRemoteBranchOperation):
  same as for the standard push: take the first url,
  report error if there are no urls defined for the remote.
[git] Refactor-simplify git-ssh architecture

Remove GitSSHIdeaService and move everything to GitSSHService.
There are no other implementations, and none is planned.
[git] Refactor-simplify git-ssh architecture

Remove one more abstraction: GitSSHService.Handler interface.
Move some javadocs to the only implementation: GitSSHGUIHandler.
[git] Refactor git-ssh architecture: generify

Rename GitSSHService to GitXmlRpcHandlerService and let it be the base
abstract class parametrized by the actual GUI handler.
Move SSH-specific code to the first implementation: GitXmlRpcSshService.
[password] Preselect "remember password" in password prompt dialog

Users usually want to remember password.
If not, they can turn the checkbox off.
[git] Implement ability to use the native Git for HTTP(S) connection

Use native command line Git for HTTP connections via GIT_ASKPASS
environment variable, to be able to get rid of the JGit library.

Method description.
The communication logic is very similar to what is already
implemented for SSH connections.
* Define the GIT_ASKPASS environment variable pointing to a script
  generated by the ScriptGenerator.
* When Git requests username and/or password for an HTTP connection,
  it calls the script defined in GIT_ASKPASS.
* The script starts the Java application GitAskPassApp and passes the
  Git request to it as command line arguments. Git process waits for the
  app to return user credentials to the app's stdout.
* GitAskPassApp requests the credentials via XML RPC from the main
  IDEA instance by calling correspondent methods of the
  GitAskPassXmlRpcHandler.
* Before Git command is called, a GitHttpAuthenticator is registered in
  the GitHttpAuthService to receive any XML RPC requests about HTTP
  authentication.
* Once the XML RPC request is received, the GitHttpAuthenticator
  either takes the password from the password safe, or shows a prompt
  to the user in a modal dialog.
* Response is provided back to the GitAskPassXmlRpcClient, which returns
  it to the GitAskPassApp, which in turn returns it to the Git process.

GitHttpAuthenticator details:
* The key for password safe is url + login (see makeKey()).
* If password is asked, then the URL contains the login inside URL,
  and the key is ready.
* If username is asked the key is constructed and is searched for in
  the settings (GitRememberedInputs).
* If no username is specified in the URL, Git queries for the username
  and for the password consecutively. In this case to avoid showing
  dialogs twice, ask for both credentials at once (AuthDialog) and
  remember the password to provide it to the Git process during the next
  request.
* We can't store the credentials enter by user in the settings and
  the password safe right after they have been entered, because user
  can enter incorrect credentials.
  Therefore, listen to the Git process output
  (GitHandler#addAuthListener) and analyze whether authentication
  was successful or failed. If it was successful, ask
  GitHttpAuthenticator to remember the correct credentials, otherwise
  forget them (since they could have been taken from the password safe,
  not from the user).
* Because of this, all other data (url and login, or url with login
  if the password was requested) is saved to the instance fields.

This change fixes all issues opened because of JGit problems:
* authorization issues: IDEA-97178, IDEA-102201, IDEA-100617,
  IDEA-98189
* connection and proxy issues: IDEA-83984, IDEA-92519, IDEA-96205
* IDEA-77411 self-signed server certificates (although we can provide
  more user-friendliness by proposing to set http.sslVerify to false
  in the UI).
* IDEA-100096 client SSL certificates.
* other: IDEA-78744, IDEA-77992, IDEA-76982, IDEA-78310, IDEA-86083,
  IDEA-92163, IDEA-94167, IDEA-99159, IDEA-100097

Known drawback:
No retry. If user enters incorrect credentials,
he will see the failure notification and will need start operation again
to supply correct data this time.
[git] Better "unsupported Git version" notification

* Improve the notification format.
* Add links to the Settings and to git-scm.com.
* Fix notification group: it is important one.
[git] Set minimal supported Git version to 1.7.1.1

This one is the first Git version which supports GIT_ASKPASS.
[git] Disable JGit usage for HTTP connections

* Keep the code under a Java system property until native Git support
  for HTTP connection is tested.
* Remove NetrcData since it is not needed anymore.
external build: configurable log dir; build log default location moved under system/log directory