Add .hgignore file

.hgignore

+syntax: glob
+
+*.pyc
+*~
+.*.swp
+LICENSES
+indra/build-darwin-*
+indra/build-vc[0-9]*
+indra/lib/mono/1.0/*.dll
+indra/lib/mono/indra/*.dll
+indra/lib/mono/indra/*.exe
+indra/lib/mono/indra/*.pdb
+indra/llwindow/glh/glh_linear.h
+indra/newview/app_settings/mozilla
+indra/newview/app_settings/mozilla-runtime-*
+indra/newview/app_settings/mozilla_debug
+indra/newview/app_settings/static_*.db2
+indra/newview/character
+indra/newview/fmod.dll
+indra/newview/mozilla-theme
+indra/newview/mozilla-universal-darwin.tgz
+indra/newview/res-sdl
+indra/newview/skins
+indra/newview/vivox-runtime
+indra/server-linux-*
+indra/test_apps/llmediatest/dependencies/i686-win32
+indra/test_apps/terrain_mule/*.dll
+indra/viewer-linux-*
+indra/web/doc/asset-upload/plugins/lsl_compiler/lslc
+indra/web/doc/asset-upload/plugins/verify-notecard
+indra/web/doc/asset-upload/plugins/verify-texture
+installed.xml
+libraries
+tarfile_tmp