Refs #10: avoid gvwstate.file to interfere with unit tests
1. move vst.write_file from pc_proto.cpp to pc.cpp
2. add pc.save_prim to control save prim component or not.
Refs #10: remove pc.save_prim and make pc.recovery to control write state file or not
Refs #10: remove gvwstate.dat file if pc.recovery=0 to avoid read stale state file.
This situation could happens in following scenario.
1. node starts up with pc.recovery=1, and has state file
2. then node starts up with pc.recovery=0, so right now state file is stale.
3. then node starts up with pc.recovery=1 again, stale file is used.
Refs #10: fix typo
Refs #10: remove state file on graceful shutdown
Refs #10: clear rst_view when pc is formed.
otherwise it may prevents pc remerge. see case https://github.com/codership/galera/issues/47\#issuecomment-45083066
Refs #10: don not clear rst view after sending install message. otherwise if network partition happens when sending install message, restored view is lost
Refs #10: set restored view type to NON_PRIM, this could solve pc remerge problem well
Refs #47: default value of MYSQL_STARTUP_WAIT is -1 which means wait infinitely, I guess
Refs #47: linger case happens much more than expected
Refs #47: wait nodes process disappear when kill node
Refs #47: fix previous error commit
Refs #47: get pid before killing and monitor process frequently
refs #10 - merged gh10 to 3.x

Squashed commit of the following:

commit 84c4983ebba509d4dbbabc1d5abb0f33eac7a937
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Mon Jun 9 18:10:01 2014 +0800

    Refs #10: set restored view type to NON_PRIM, this could solve pc remerge problem well

commit 8fd683ee1fb9f5994643b1c9150c9a5d3f148ec1
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Mon Jun 9 09:16:42 2014 +0800

    Refs #10: don not clear rst view after sending install message. otherwise if network partition happens when sending install message, restored view is lost

commit 7e5ddba94f97f4d13f5e27bde10a1b17bfe6b319
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Sun Jun 8 13:21:29 2014 +0800

    Refs #10: clear rst_view when pc is formed.
    otherwise it may prevents pc remerge. see case https://github.com/codership/galera/issues/47\#issuecomment-45083066

commit 9bcd01fc57ef2ac66c25c1ffa10b2f1dd6900472
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Tue Jun 3 17:28:05 2014 +0800

    Refs #10: remove state file on graceful shutdown

commit 53ae454a387d0cbe8d3b10126e755f20aee27fb3
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Tue Jun 3 15:05:58 2014 +0800

    Refs #10: fix typo

commit 0afd00e539be4829b51d7d788b09b84a9f25032d
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Tue Jun 3 10:30:53 2014 +0800

    Refs #10: remove gvwstate.dat file if pc.recovery=0 to avoid read stale state file.
    This situation could happens in following scenario.
    1. node starts up with pc.recovery=1, and has state file
    2. then node starts up with pc.recovery=0, so right now state file is stale.
    3. then node starts up with pc.recovery=1 again, stale file is used.

commit 6003b0ef602fe31c9f82dc92c518426d033f17b4
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Mon Jun 2 07:19:54 2014 +0800

    Refs #10: remove pc.save_prim and make pc.recovery to control write state file or not

commit 30a66da960dec9263b4c65e4a66e0404c6fa7ea3
Author: dirtysalt <dirtysalt1987@gmail.com>
Date:   Sun Jun 1 23:02:56 2014 +0800

    Refs #10: avoid gvwstate.file to interfere with unit tests
    1. move vst.write_file from pc_proto.cpp to pc.cpp
    2. add pc.save_prim to control save prim component or not.
Merge branch 'gh47' into 3.x
Ref #7.  Removed orphaned files, i.e. instances where the file content has been moved elsewhere in the documentation.
Ref #36.  Hid toctree elements and reworked the header pages towards the new system.
Updated MySQL source installation for new material from pull.
Updated hover text for Edit on Github link.
Merge branch 'gh10' into 3.x