Merge branch 'develop' into feature/platformio-30

* develop:
  Update docs for Teensy USB Features // Issue #722
  Implement Teensy 2.0 USB functionality (HID, SERIAL_HID, DISK, MIDI, etc.) // Resolve #722
  Add support for Pinoccio Scout board // Resolve #52
  Fix broken LD Script for Element14 chipKIT Pi board // Resolve #725  Resolve #726
  Fix USB flags processing for teensy platform // Issue #722
  Add Pinoccio board // Issue #52
  Minor improvements for CLion docs
  Improved docs for integration with CLion IDE
  Version bump to 2.11.1 (issues #472, #629, #710, #711, #712, #713, #718)
  Typo fix
  Add "udev" rules for OpenOCD CMSIS-DAP adapters // Resolve #718
  Update history
  Ignore "[platformio]" section from custom project configuration CI
  Bump to 2.11.1b1
  Add Arduino M0 Pro and Tian to the examples // Issue #472
  Fix issue when `pioenvs` folder doesn't exist
  Add more info about `.pioenvs` directory
  Improve CMSIS selection for SAMD21 boards
  Improve support for SAMD21 based boards
  Add contributing guidelines

platformio/commands/ci.py

@@ -27,6 +27,12 @@ from platformio.commands.init import validate_boards
 from platformio.commands.run import cli as cmd_run
 from platformio.exception import CIBuildEnvsEmpty
 
+# pylint: disable=wrong-import-order
+try:
+    from configparser import ConfigParser
+except ImportError:
+    from ConfigParser import ConfigParser
+
 
 def validate_path(ctx, param, value):  # pylint: disable=W0613
     invalid_path = None
@@ -81,7 +87,7 @@ def cli(ctx, src, lib, exclude, board,  # pylint: disable=R0913
             _copy_contents(join(build_dir, dir_name), contents)
 
         if project_conf and isfile(project_conf):
-            copyfile(project_conf, join(build_dir, "platformio.ini"))
+            _copy_project_conf(build_dir, project_conf)
         elif not board:
             raise CIBuildEnvsEmpty()
 
@@ -147,3 +153,12 @@ def _exclude_contents(dst_dir, patterns):
             rmtree(path)
         elif isfile(path):
             remove(path)
+
+
+def _copy_project_conf(build_dir, project_conf):
+    cp = ConfigParser()
+    cp.read(project_conf)
+    if cp.has_section("platformio"):
+        cp.remove_section("platformio")
+    with open(join(build_dir, "platformio.ini"), "w") as fp:
+        cp.write(fp)