A boatload of changes

Added import file filter so it only shows LDR, DAT, and LCD. Added a WIP
game cleanup option. Changed Hi-res brick import setting. Commenting
Materials.
Update README.md and CONTRIBUTING.md, lint checking,

Trim .gitignore
More HTML updates, more "", minor changes to WIP GameFix,

format `color` dictionary

I need to sort out this CleanUp/GameFix stuff
Minor README.md
Update ldraw_import.py, Better Error Handling

All outputs to the console now use a debugPrint(STRING) function which is a wrapper for print('[LDraw Importer] '+STRING+' - '+CURRENT_TIME_IN_HOURS:MINUTES:SECONDS)

This makes it easier to determine what messages come from what addons and exactly when they happened.

EXAMPLE 1:
~$: [LDraw Importer] Attempting to import /home/USER/LDCad/plane.ldr - 11:08:46

2. Major error messages now display a small popup when called, notifying the user in Blender's UI, instead of silently closing the file select screen and only outputting to the console.

3. Major Error messages now identify what type of error they were, and print the stack trace where necessary.

EXAMPLE 3:
~$:[LDraw Importer] ERROR: UnicodeDecodeError
Traceback (most recent call last):
  File "ldraw_import.py", line 671, in create_model
    LDrawFile(context, file_name, mat)
  File "ldraw_import.py", line 71, in __init__
    self.parse(filename)
  File "ldraw_import.py", line 169, in parse
    lines = f_in.readlines()
  File "Software/Blender-2.69/2.69/python/lib/python3.3/codecs.py", line 300, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x90 in position 54: invalid start byte

 - 11:01:18
[Debug] ERROR: File not imported. Reason: UnicodeDecodeError. - 11:01:18

4. Importing files which do not have a .ldr, .dat, or .mpd extension will not be attempted, and will tell the user through a popup in Blender's UI.

EXAMPLE 4:
[Debug] Attempting to import /home/USER/TestZipFle.zip - 11:06:53
[Debug] ERROR: File not imported. Reason: Invalid File Type (Must be a .dat, .ldr, or .mpd) - 11:06:53
Fix indented GPL Header
Replaced a couple single quotes with double quotes, and use spaces instead of tabs.
Finished CleanUp changes only changes, select all mesh once import is complete,

Comment this area, fix typo, documentation

FYI, `lint:ok` (and #lint:enable/#lint:disable) stems from my IDE of
choice, @ninja-ide. It has an error (lint) checker, and it does not like
global variables (hopefully they will fix that bug soon).
Update ldraw_import.py to conform to PEP8 Standards

Now conforms to PEP8 Standards, except for some line lengths that are not my code, nor make sense to shorten.
Merge pull request #14 from Tribex/better_errors, closes #14
Minor fixes to CONTRIBUTING.md, use `str,format` for new messages

introduced in previous commit, small line length fixes
Rework display of import options

Messages are not final
Comments, update bl_info, more + --> str.format, big ugly commented block for testing
Test confirmed to work, split check for subpart into separate function,

Fixed NameError for `isPart` when importing from relative path (relative
to model location)
Merge pull request #1 from le717/master

Merge backwards