[#2335] [GTKUI] Fix startup failing with 'cannot acquire lock'

This issue was caused by an unclean shutdown of Deluge, usually on system shutdown, and upon rebooting
the PID stored in the lockfile is in used by another process thus the lockfile is never removed. It
affects users with Deluge set in startup applications as the PIDs are more likely to be reused.

 * Lockfile is removed if Deluge is restarted in IPC.
 * Renamed the old_tempfile variable to make it clearer as to it's role.
Update copyright year in About dialog
[WebUI] Security update for POODLE vulnerability

WebUI with HTTPS enabled is vulnerable to POODLE (CVE­-2014­-3566), so switch from
SSLv3 to TLSv1.
[Core] Remove old windows cache fix

This removes a fix for #1869 (using 0.15 lt) that is now fixed properly in 0.16 lt.
[#2555] [Core] Disable use of SSLv3 for DelugeRPC
[WebUI] Modify SSL Context to allow >=TLSv1 protocol

 * The TLSv1_METHOD is a fixed protocol version so this change will allow higher versions to be used where possible.
[WebUI] Remove unneeded grid key and fix torrent record
[WebUI] Add missing column entries to Torrent Record
[GTKUI] [Win32] Fix 'access is denied' with magnet association

 * Issue occurs with user without administrator privileges
 * See github pull request #19 for details
[#2676] Add pilow and appindicator to DEPENDS
[#2256] [GTKUI] Indexes aren't updated properly when removing columns
[#2698] [GTKUI] Fix corrupted column indexes when using multiple col_types

 * Ensures that removing multiple items from liststore_columns list does not affect the index.
[Core] [Tests] Changes to component.shutdown and unit tests

* component registry shutdown() now cleans up the component list
  this ensures that no old components are left when running unit
  tests.

* Added class BaseTestCase that all tests that create components
  should inherit from. It verifies the compoent list before and
  after the tests are run.
[Tests] Various fixes for unit tests and tox

* Added custom trial reporter for TODO with test example in test_torrentmanager.py
* Set Stats plugin tests as todo
* Disable new_release_check when running unit tests
* Added pytest.mark.slow to test_core.test_test_listen_port
* Get rid of unit test warnings (Caused by bad names in test classes)
* Removed warnings.filterwarnings in test files.
* Added separate tox target for generating test coverage HTML report.
[Tests] Changes to tests and test configs of Travis/tox

* Added pip chaching
* Added disable_new_release_check to tracker icons tests
* Fixed test_torrentview
* Require minimum tox version 1.8
* Fixed GTKUI tests and testcoverage by using xvfb on travis
* Separated the apt dependencies for commands requiering GTKUI deps
Temporarily disable testcoverage in travis build
[#2670] [GTKUI] addtorrentdialog: fix O(N^2) algorithm in add_files by recalculating folder state once instead of per-child
[#2670] [GTKUI] optimize file trees according to pygtk tips

Use a context manager to wrap the common steps:

1) disconnect the treestore from the listview
2) disable treestore sorting
3) add rows (different in add dialog vs files tab)
4) enable treestore sorting
5) connect model to listview
[GTKUI] files_tab: sort by name by default
[#2702] [GTKUI] Fix potential markup warning in Details Tab

 * Comments with HTML markup cause a GTK markup warning.
 * Use cgi function to escape '&', '<' and '>' to prevent pango markup error.